1 ;;; calc-graph.el --- graph output functions for Calc
3 ;; Copyright (C) 1990-1993, 2001-2015 Free Software Foundation, Inc.
5 ;; Author: David Gillespie <daveg@synaptics.com>
6 ;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
27 ;; This file is autoloaded from calc-ext.el.
34 ;; The following three variables are customizable and defined in calc.el.
35 (defvar calc-gnuplot-name)
36 (defvar calc-gnuplot-plot-command)
37 (defvar calc-gnuplot-print-command)
39 (defvar calc-gnuplot-tempfile "calc")
41 (defvar calc-gnuplot-default-device)
42 (defvar calc-gnuplot-default-output)
43 (defvar calc-gnuplot-print-device)
44 (defvar calc-gnuplot-print-output)
45 (defvar calc-gnuplot-keep-outfile nil)
46 (defvar calc-gnuplot-version nil)
48 (defvar calc-gnuplot-display (getenv "DISPLAY"))
49 (defvar calc-gnuplot-geometry)
51 (defvar calc-graph-default-resolution)
52 (defvar calc-graph-default-resolution-3d)
53 (defvar calc-graph-default-precision 5)
55 (defvar calc-gnuplot-buffer nil)
56 (defvar calc-gnuplot-input nil)
58 (defvar calc-gnuplot-last-error-pos 1)
59 (defvar calc-graph-last-device nil)
60 (defvar calc-graph-last-output nil)
61 (defvar calc-graph-file-cache nil)
62 (defvar calc-graph-var-cache nil)
63 (defvar calc-graph-data-cache nil)
64 (defvar calc-graph-data-cache-limit 10)
65 (defvar calc-graph-no-auto-view nil)
66 (defvar calc-graph-no-wait nil)
67 (defvar calc-gnuplot-trail-mark)
69 (defun calc-graph-fast (many)
71 (let ((calc-graph-no-auto-view t))
74 (calc-graph-plot nil)))
76 (defun calc-graph-fast-3d (many)
78 (let ((calc-graph-no-auto-view t))
80 (calc-graph-add-3d many)
81 (calc-graph-plot nil)))
83 (defun calc-graph-delete (all)
87 (with-current-buffer calc-gnuplot-input
88 (and (calc-graph-find-plot t all)
90 (if (looking-at "s?plot")
92 (setq calc-graph-var-cache nil)
93 (delete-region (point) (point-max)))
94 (delete-region (point) (1- (point-max)))))))
95 (calc-graph-view-commands)))
97 (defun calc-graph-find-plot (&optional before all)
98 (goto-char (point-min))
99 (and (re-search-forward "^s?plot[ \t]+" nil t)
101 (goto-char (point-max))
103 (not (search-backward "," nil t))
108 (beginning-of-line)))
110 (re-search-forward ",[ \t]+")))
113 (defun calc-graph-add (many)
118 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 2))
119 (calc-graph-lookup (calc-top-n 1))))
120 ((or (consp many) (eq many 0))
121 (let ((xdata (calc-graph-lookup (calc-top-n 2)))
122 (ylist (calc-top-n 1)))
123 (or (eq (car-safe ylist) 'vec)
124 (error "Y argument must be a vector"))
125 (while (setq ylist (cdr ylist))
126 (calc-graph-add-curve xdata (calc-graph-lookup (car ylist))))))
127 ((> (setq many (prefix-numeric-value many)) 0)
128 (let ((xdata (calc-graph-lookup (calc-top-n (1+ many)))))
130 (calc-graph-add-curve xdata
131 (calc-graph-lookup (calc-top-n many)))
132 (setq many (1- many)))))
137 (setq pair (calc-top-n many))
138 (or (and (eq (car-safe pair) 'vec)
140 (error "Argument must be an [x,y] vector"))
141 (calc-graph-add-curve (calc-graph-lookup (nth 1 pair))
142 (calc-graph-lookup (nth 2 pair)))
143 (setq many (1- many))))))
144 (calc-graph-view-commands)))
146 (defun calc-graph-add-3d (many)
151 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 3))
152 (calc-graph-lookup (calc-top-n 2))
153 (calc-graph-lookup (calc-top-n 1))))
154 ((or (consp many) (eq many 0))
155 (let ((xdata (calc-graph-lookup (calc-top-n 3)))
156 (ydata (calc-graph-lookup (calc-top-n 2)))
157 (zlist (calc-top-n 1)))
158 (or (eq (car-safe zlist) 'vec)
159 (error "Z argument must be a vector"))
160 (while (setq zlist (cdr zlist))
161 (calc-graph-add-curve xdata ydata
162 (calc-graph-lookup (car zlist))))))
163 ((> (setq many (prefix-numeric-value many)) 0)
164 (let ((xdata (calc-graph-lookup (calc-top-n (+ many 2))))
165 (ydata (calc-graph-lookup (calc-top-n (+ many 1)))))
167 (calc-graph-add-curve xdata ydata
168 (calc-graph-lookup (calc-top-n many)))
169 (setq many (1- many)))))
174 (setq curve (calc-top-n many))
175 (or (and (eq (car-safe curve) 'vec)
176 (= (length curve) 4))
177 (error "Argument must be an [x,y,z] vector"))
178 (calc-graph-add-curve (calc-graph-lookup (nth 1 curve))
179 (calc-graph-lookup (nth 2 curve))
180 (calc-graph-lookup (nth 3 curve)))
181 (setq many (1- many))))))
182 (calc-graph-view-commands)))
184 (defun calc-graph-add-curve (xdata ydata &optional zdata)
185 (let ((num (calc-graph-count-curves))
186 (pstyle (calc-var-value 'var-PointStyles))
187 (lstyle (calc-var-value 'var-LineStyles)))
188 (with-current-buffer calc-gnuplot-input
189 (goto-char (point-min))
190 (if (re-search-forward (if zdata "^plot[ \t]" "^splot[ \t]")
192 (error "Can't mix 2d and 3d curves on one graph"))
193 (if (re-search-forward "^s?plot[ \t]" nil t)
197 (goto-char (point-max))
198 (or (eq (preceding-char) ?\n)
200 (insert (if zdata "splot" "plot") " \n")
202 (insert "{" (symbol-name (nth 1 xdata))
203 ":" (symbol-name (nth 1 ydata)))
205 (insert ":" (symbol-name (nth 1 zdata))))
207 "title \"" (symbol-name (nth 1 ydata)) "\" "
209 (setq pstyle (and (eq (car-safe pstyle) 'vec) (nth (1+ num) pstyle)))
210 (setq lstyle (and (eq (car-safe lstyle) 'vec) (nth (1+ num) lstyle))))
211 (calc-graph-set-styles
212 (or (and (Math-num-integerp lstyle) (math-trunc lstyle))
214 (or (and (Math-num-integerp pstyle) (math-trunc pstyle))
215 (if (eq (car-safe (calc-var-value (nth 2 ydata))) 'vec)
217 (math-contains-sdev-p (eval (nth 2 ydata))))))
219 (defun calc-graph-lookup (thing)
220 (if (and (eq (car-safe thing) 'var)
221 (calc-var-value (nth 2 thing)))
223 (let ((found (assoc thing calc-graph-var-cache)))
225 (let ((varname (concat "PlotData"
227 (1+ (length calc-graph-var-cache)))))
229 (setq var (list 'var (intern varname)
230 (intern (concat "var-" varname)))
231 found (cons thing var)
232 calc-graph-var-cache (cons found calc-graph-var-cache))
233 (set (nth 2 var) thing)))
236 (defun calc-graph-juggle (arg)
239 (with-current-buffer calc-gnuplot-input
241 (let ((num (calc-graph-count-curves)))
244 (setq arg (+ arg num))))))
245 (while (>= (setq arg (1- arg)) 0)
246 (calc-graph-do-juggle))))
248 (defun calc-graph-count-curves ()
249 (with-current-buffer calc-gnuplot-input
250 (if (re-search-forward "^s?plot[ \t]" nil t)
252 (goto-char (point-min))
253 (while (search-forward "," nil t)
258 (defun calc-graph-do-juggle ()
260 (and (calc-graph-find-plot t t)
263 (calc-graph-find-plot t nil)
264 (or (eq base (point))
265 (let ((str (buffer-substring (+ (point) 2) (1- (point-max)))))
266 (delete-region (point) (1- (point-max)))
267 (goto-char (+ base 5))
268 (insert str ", ")))))))
270 (defun calc-graph-print (flag)
272 (calc-graph-plot flag t))
276 (defvar var-PlotRejects)
278 ;; The following variables are local to calc-graph-plot, but are
279 ;; used in the functions calc-graph-compute-2d, calc-graph-refine-2d,
280 ;; calc-graph-recompute-2d, calc-graph-compute-3d and
281 ;; calc-graph-format-data, which are called by calc-graph-plot.
282 (defvar calc-graph-yvalue)
283 (defvar calc-graph-yvec)
284 (defvar calc-graph-numsteps)
285 (defvar calc-graph-numsteps3)
286 (defvar calc-graph-xvalue)
287 (defvar calc-graph-xvec)
288 (defvar calc-graph-xname)
289 (defvar calc-graph-yname)
290 (defvar calc-graph-xstep)
291 (defvar calc-graph-ycache)
292 (defvar calc-graph-ycacheptr)
293 (defvar calc-graph-refine)
294 (defvar calc-graph-keep-file)
295 (defvar calc-graph-xval)
296 (defvar calc-graph-xlow)
297 (defvar calc-graph-xhigh)
298 (defvar calc-graph-yval)
299 (defvar calc-graph-yp)
300 (defvar calc-graph-xp)
301 (defvar calc-graph-zp)
302 (defvar calc-graph-yvector)
303 (defvar calc-graph-resolution)
304 (defvar calc-graph-y3value)
305 (defvar calc-graph-y3name)
306 (defvar calc-graph-y3step)
307 (defvar calc-graph-zval)
308 (defvar calc-graph-stepcount)
309 (defvar calc-graph-is-splot)
310 (defvar calc-graph-surprise-splot)
311 (defvar calc-graph-blank)
312 (defvar calc-graph-non-blank)
313 (defvar calc-graph-curve-num)
315 (defun calc-graph-plot (flag &optional printing)
318 (let ((calcbuf (current-buffer))
319 (tempbuf (get-buffer-create "*Gnuplot Temp-2*"))
322 (calc-graph-curve-num 0)
323 (calc-graph-refine (and flag (> (prefix-numeric-value flag) 0)))
324 (recompute (and flag (< (prefix-numeric-value flag) 0)))
325 (calc-graph-surprise-splot nil)
327 cache-env calc-graph-is-splot device output calc-graph-resolution precision samples-pos)
328 (add-hook 'kill-emacs-hook 'calc-graph-kill-hook)
333 (set-buffer calc-gnuplot-input)
334 (goto-char (point-min))
335 (setq calc-graph-is-splot (re-search-forward "^splot[ \t]" nil t))
336 (let ((str (buffer-string))
337 (ver calc-gnuplot-version))
338 (set-buffer (get-buffer-create "*Gnuplot Temp*"))
340 (insert "# (Note: This is a temporary copy---do not edit!)\n")
342 (insert "set noarrow\nset nolabel\n"
343 "set autoscale xy\nset nologscale xy\n"
344 "set xlabel\nset ylabel\nset title\n"
345 "set noclip points\nset clip one\nset clip two\n"
346 "set format \"%g\"\nset tics\nset xtics\nset ytics\n"
347 "set style data linespoints\n"
348 "set nogrid\nset nokey\nset nopolar\n"))
350 (insert "set surface\nset nocontour\n"
351 "set " (if calc-graph-is-splot "" "no") "parametric\n"
352 "set notime\nset border\nset ztics\nset zeroaxis\n"
353 "set view 60,30,1,1\nset offsets 0,0,0,0\n"))
354 (setq samples-pos (point))
356 (goto-char (point-min))
357 (if calc-graph-is-splot
358 (if calc-graph-refine
359 (error "This option works only for 2d plots")
361 (let ((calc-gnuplot-input (current-buffer))
362 (calc-graph-no-auto-view t))
364 (setq device calc-gnuplot-print-device
365 output calc-gnuplot-print-output)
366 (setq device (calc-graph-find-command "terminal")
367 output (calc-graph-find-command "output"))
369 (setq device calc-gnuplot-default-device))
371 (setq output (car (read-from-string output)))
372 (setq output calc-gnuplot-default-output)))
373 (if (or (equal device "") (equal device "default"))
376 (printing "postscript")
377 ;; Check MS-Windows before X, in case they have
378 ;; $DISPLAY set for some reason (e.g., Cygwin or
380 ((string= calc-gnuplot-name "pgnuplot")
382 ((or (eq window-system 'x) (getenv "DISPLAY"))
384 ((>= calc-gnuplot-version 3)
387 (if (equal device "dumb")
388 (setq device (format "dumb %d %d"
389 (1- (frame-width)) (1- (frame-height)))))
390 (if (equal device "big")
391 (setq device (format "dumb %d %d"
392 (* 4 (- (frame-width) 3))
393 (* 4 (- (frame-height) 3)))))
395 (if (or (equal output "auto")
396 (and (equal output "tty") (setq tty-output t)))
397 (setq tempoutfile (calc-temp-file-name -1)
399 (setq output (eval output)))
400 (or (equal device calc-graph-last-device)
402 (setq calc-graph-last-device device)
403 (calc-gnuplot-command "set terminal" device)))
404 (or (equal output calc-graph-last-output)
406 (setq calc-graph-last-output output)
407 (calc-gnuplot-command "set output"
408 (if (equal output "STDOUT")
410 (prin1-to-string output)))))
411 (setq calc-graph-resolution (calc-graph-find-command "samples"))
412 (if calc-graph-resolution
413 (setq calc-graph-resolution (string-to-number calc-graph-resolution))
414 (setq calc-graph-resolution (if calc-graph-is-splot
415 calc-graph-default-resolution-3d
416 calc-graph-default-resolution)))
417 (setq precision (calc-graph-find-command "precision"))
419 (setq precision (string-to-number precision))
420 (setq precision calc-graph-default-precision))
421 (calc-graph-set-command "terminal")
422 (calc-graph-set-command "output")
423 (calc-graph-set-command "samples")
424 (calc-graph-set-command "precision"))
425 (goto-char samples-pos)
426 (insert "set samples " (int-to-string (max (if calc-graph-is-splot 20 200)
427 (+ 5 calc-graph-resolution))) "\n")
428 (while (re-search-forward "{\\*[^}]+}[^,\n]*" nil t)
429 (delete-region (match-beginning 0) (match-end 0))
432 (while (memq (preceding-char) '(?\s ?\t))
434 (if (eq (preceding-char) ?\,)
436 (with-current-buffer calcbuf
437 (setq cache-env (list calc-angle-mode
442 precision calc-graph-is-splot))
443 (if (and (not recompute)
444 (equal (cdr (car calc-graph-data-cache)) cache-env))
445 (while (> (length calc-graph-data-cache)
446 calc-graph-data-cache-limit)
447 (setcdr calc-graph-data-cache
448 (cdr (cdr calc-graph-data-cache))))
449 (setq calc-graph-data-cache (list (cons nil cache-env)))))
450 (calc-graph-find-plot t t)
451 (while (re-search-forward
452 (if calc-graph-is-splot
453 "{\\([^{}:\n]+\\):\\([^{}:\n]+\\):\\([^{}:\n]+\\)}"
454 "{\\([^{}:\n]+\\)\\(:\\)\\([^{}:\n]+\\)}")
456 (setq calc-graph-curve-num (1+ calc-graph-curve-num))
457 (let* ((calc-graph-xname (buffer-substring (match-beginning 1) (match-end 1)))
458 (xvar (intern (concat "var-" calc-graph-xname)))
459 (calc-graph-xvalue (math-evaluate-expr (calc-var-value xvar)))
460 (calc-graph-y3name (and calc-graph-is-splot
461 (buffer-substring (match-beginning 2)
463 (y3var (and calc-graph-is-splot (intern (concat "var-" calc-graph-y3name))))
464 (calc-graph-y3value (and calc-graph-is-splot (calc-var-value y3var)))
465 (calc-graph-yname (buffer-substring (match-beginning 3) (match-end 3)))
466 (yvar (intern (concat "var-" calc-graph-yname)))
467 (calc-graph-yvalue (calc-var-value yvar))
469 (delete-region (match-beginning 0) (match-end 0))
470 (setq filename (calc-temp-file-name calc-graph-curve-num))
471 (with-current-buffer calcbuf
473 (calc-graph-xp calc-graph-xvalue)
474 (calc-graph-yp calc-graph-yvalue)
476 (calc-graph-xlow nil) (calc-graph-xhigh nil) (y3low nil) (y3high nil)
477 calc-graph-xvec calc-graph-xval calc-graph-xstep var-DUMMY
478 y3val calc-graph-y3step var-DUMMY2 (calc-graph-zval nil)
479 calc-graph-yvec calc-graph-yval calc-graph-ycache calc-graph-ycacheptr calc-graph-yvector
480 calc-graph-numsteps calc-graph-numsteps3
481 (calc-graph-keep-file (and (not calc-graph-is-splot) (file-exists-p filename)))
482 (calc-graph-stepcount 0)
483 (calc-symbolic-mode nil)
484 (calc-prefer-frac nil)
485 (calc-internal-prec (max 3 precision))
486 (calc-simplify-mode (and (not (memq calc-simplify-mode
490 (calc-graph-non-blank nil)
491 (math-working-step 0)
492 (math-working-step-2 nil))
494 (if calc-graph-is-splot
495 (calc-graph-compute-3d)
496 (calc-graph-compute-2d))
498 (goto-char (point-max))
499 (insert "\n" calc-graph-xname)
500 (if calc-graph-is-splot
501 (insert ":" calc-graph-y3name))
502 (insert ":" calc-graph-yname "\n\n")
503 (setq tempbuftop (point))
504 (let ((calc-group-digits nil)
505 (calc-leading-zeros nil)
506 (calc-number-radix 10)
507 (calc-twos-complement-mode nil)
508 (entry (and (not calc-graph-is-splot)
509 (list calc-graph-xp calc-graph-yp calc-graph-xhigh calc-graph-numsteps))))
511 (nth 1 (nth (1+ calc-graph-curve-num)
512 calc-graph-file-cache)))
513 (setq calc-graph-keep-file nil))
514 (setcar (cdr (nth (1+ calc-graph-curve-num) calc-graph-file-cache))
516 (or calc-graph-keep-file
517 (calc-graph-format-data)))
518 (or calc-graph-keep-file
520 (or calc-graph-non-blank
521 (error "No valid data points for %s:%s"
522 calc-graph-xname calc-graph-yname))
523 (write-region tempbuftop (point-max) filename
525 (insert (prin1-to-string filename))))
526 (if calc-graph-surprise-splot
527 (setcdr cache-env nil))
528 (if (= calc-graph-curve-num 0)
530 (calc-gnuplot-command "clear")
531 (calc-clear-command-flag 'clear-message)
532 (message "No data to plot!"))
533 (setq calc-graph-data-cache-limit (max calc-graph-curve-num
534 calc-graph-data-cache-limit))
535 (let ((filename (calc-temp-file-name 0)))
536 (write-region (point-min) (point-max) filename nil 'quiet)
537 (calc-gnuplot-command "load" (prin1-to-string filename)))
538 (or (equal output "STDOUT")
539 calc-gnuplot-keep-outfile
540 (progn ; need to close the output file before printing/plotting
541 (setq calc-graph-last-output "STDOUT")
542 (calc-gnuplot-command "set output")))
543 (let ((command (if printing
544 calc-gnuplot-print-command
545 (or calc-gnuplot-plot-command
546 (and (string-match "^dumb" device)
547 'calc-graph-show-dumb)
549 'calc-graph-show-tty)))))
551 (if (stringp command)
552 (calc-gnuplot-command
555 calc-gnuplot-print-output)))
556 (if (symbolp command)
557 (funcall command output)
558 (eval command))))))))))
560 (defun calc-graph-compute-2d ()
561 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
562 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
563 (error "Can't plot an empty vector")
564 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
565 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
566 (error "%s and %s have different lengths" calc-graph-xname calc-graph-yname))
567 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
568 (math-constp calc-graph-xvalue))
569 (setq calc-graph-xstep (math-div (math-sub (nth 3 calc-graph-xvalue)
570 (nth 2 calc-graph-xvalue))
571 (1- calc-graph-numsteps))
572 calc-graph-xvalue (nth 2 calc-graph-xvalue))
573 (if (math-realp calc-graph-xvalue)
574 (setq calc-graph-xstep 1)
575 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname)))))
576 (or (math-realp calc-graph-yvalue)
577 (let ((math-arglist nil))
578 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
579 (calc-default-formula-arglist calc-graph-yvalue)
581 (error "%s does not contain any unassigned variables" calc-graph-yname))
582 (and (cdr math-arglist)
583 (error "%s contains more than one variable: %s"
584 calc-graph-yname math-arglist))
585 (setq calc-graph-yvalue (math-expr-subst calc-graph-yvalue
586 (math-build-var-name (car math-arglist))
587 '(var DUMMY var-DUMMY)))))
588 (setq calc-graph-ycache (assoc calc-graph-yvalue calc-graph-data-cache))
589 (delq calc-graph-ycache calc-graph-data-cache)
590 (nconc calc-graph-data-cache
591 (list (or calc-graph-ycache (setq calc-graph-ycache (list calc-graph-yvalue)))))
592 (if (and (not (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec)))
593 calc-graph-refine (cdr (cdr calc-graph-ycache)))
594 (calc-graph-refine-2d)
595 (calc-graph-recompute-2d))))
597 (defun calc-graph-refine-2d ()
598 (setq calc-graph-keep-file nil
599 calc-graph-ycacheptr (cdr calc-graph-ycache))
600 (if (and (setq calc-graph-xval (calc-graph-find-command "xrange"))
601 (string-match "\\`\\[\\([0-9.eE+-]*\\):\\([0-9.eE+-]*\\)\\]\\'"
603 (let ((b2 (match-beginning 2))
605 (setq calc-graph-xlow (math-read-number (substring calc-graph-xval
608 calc-graph-xhigh (math-read-number (substring calc-graph-xval b2 e2))))
610 (while (and (cdr calc-graph-ycacheptr)
611 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xlow))
612 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))))
613 (setq math-working-step-2 (1- (length calc-graph-ycacheptr)))
614 (while (and (cdr calc-graph-ycacheptr)
615 (or (not calc-graph-xhigh)
616 (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xhigh)))
617 (setq var-DUMMY (math-div (math-add (car (car calc-graph-ycacheptr))
618 (car (nth 1 calc-graph-ycacheptr)))
620 math-working-step (1+ math-working-step)
621 calc-graph-yval (math-evaluate-expr calc-graph-yvalue))
622 (setcdr calc-graph-ycacheptr (cons (cons var-DUMMY calc-graph-yval)
623 (cdr calc-graph-ycacheptr)))
624 (setq calc-graph-ycacheptr (cdr (cdr calc-graph-ycacheptr))))
625 (setq calc-graph-yp calc-graph-ycache
626 calc-graph-numsteps 1000000))
628 (defun calc-graph-recompute-2d ()
629 (setq calc-graph-ycacheptr calc-graph-ycache)
631 (setq calc-graph-numsteps (1- (length calc-graph-xvalue))
632 calc-graph-yvector nil)
633 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
634 (math-constp calc-graph-xvalue))
635 (setq calc-graph-numsteps calc-graph-resolution
637 calc-graph-xlow (nth 2 calc-graph-xvalue)
638 calc-graph-xhigh (nth 3 calc-graph-xvalue)
639 calc-graph-xstep (math-div (math-sub calc-graph-xhigh calc-graph-xlow)
640 (1- calc-graph-numsteps))
641 calc-graph-xvalue (nth 2 calc-graph-xvalue))
642 (error "%s is not a suitable basis for %s"
643 calc-graph-xname calc-graph-yname)))
644 (setq math-working-step-2 calc-graph-numsteps)
645 (while (>= (setq calc-graph-numsteps (1- calc-graph-numsteps)) 0)
646 (setq math-working-step (1+ math-working-step))
649 (setq calc-graph-xp (cdr calc-graph-xp)
650 calc-graph-xval (car calc-graph-xp))
651 (and (not (eq calc-graph-ycacheptr calc-graph-ycache))
652 (consp (car calc-graph-ycacheptr))
653 (not (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xval))
654 (setq calc-graph-ycacheptr calc-graph-ycache)))
655 (if (= calc-graph-numsteps 0)
656 (setq calc-graph-xval calc-graph-xhigh) ; avoid cumulative roundoff
657 (setq calc-graph-xval calc-graph-xvalue
658 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep))))
659 (while (and (cdr calc-graph-ycacheptr)
660 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
661 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))
662 (or (and (cdr calc-graph-ycacheptr)
663 (Math-equal (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
665 (setq calc-graph-keep-file nil
666 var-DUMMY calc-graph-xval)
667 (setcdr calc-graph-ycacheptr (cons (cons calc-graph-xval (math-evaluate-expr calc-graph-yvalue))
668 (cdr calc-graph-ycacheptr)))))
669 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr))
671 (setq calc-graph-yvector (cons (cdr (car calc-graph-ycacheptr)) calc-graph-yvector))
672 (or calc-graph-yp (setq calc-graph-yp calc-graph-ycacheptr))))
674 (setq calc-graph-xp calc-graph-xvalue
676 calc-graph-yp (cons 'vec (nreverse calc-graph-yvector))
677 calc-graph-numsteps (1- (length calc-graph-xp)))
678 (setq calc-graph-numsteps 1000000)))
680 (defun calc-graph-compute-3d ()
681 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
682 (if (math-matrixp calc-graph-yvalue)
684 (setq calc-graph-numsteps (1- (length calc-graph-yvalue))
685 calc-graph-numsteps3 (1- (length (nth 1 calc-graph-yvalue))))
686 (if (eq (car-safe calc-graph-xvalue) 'vec)
687 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
688 (error "%s has wrong length" calc-graph-xname))
689 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
690 (math-constp calc-graph-xvalue))
691 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps
692 (nth 2 calc-graph-xvalue)
694 (math-sub (nth 3 calc-graph-xvalue)
695 (nth 2 calc-graph-xvalue))
696 (1- calc-graph-numsteps))))
697 (if (math-realp calc-graph-xvalue)
698 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps calc-graph-xvalue 1))
699 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))))
700 (if (eq (car-safe calc-graph-y3value) 'vec)
701 (or (= (1- (length calc-graph-y3value)) calc-graph-numsteps3)
702 (error "%s has wrong length" calc-graph-y3name))
703 (if (and (eq (car-safe calc-graph-y3value) 'intv)
704 (math-constp calc-graph-y3value))
705 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3
706 (nth 2 calc-graph-y3value)
708 (math-sub (nth 3 calc-graph-y3value)
709 (nth 2 calc-graph-y3value))
710 (1- calc-graph-numsteps3))))
711 (if (math-realp calc-graph-y3value)
712 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3 calc-graph-y3value 1))
713 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))))
714 (setq calc-graph-xp nil
718 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue) calc-graph-yvalue (cdr calc-graph-yvalue))
719 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
720 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
721 calc-graph-zp (nconc calc-graph-zp (cons '(skip)
722 (copy-sequence (cdr (car calc-graph-yvalue)))))))
723 (setq calc-graph-numsteps (1- (* calc-graph-numsteps
724 (1+ calc-graph-numsteps3)))))
725 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
726 (error "Can't plot an empty vector"))
727 (or (and (eq (car-safe calc-graph-xvalue) 'vec)
728 (= (1- (length calc-graph-xvalue)) calc-graph-numsteps))
729 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))
730 (or (and (eq (car-safe calc-graph-y3value) 'vec)
731 (= (1- (length calc-graph-y3value)) calc-graph-numsteps))
732 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))
733 (setq calc-graph-xp calc-graph-xvalue
734 calc-graph-yp calc-graph-y3value
735 calc-graph-zp calc-graph-yvalue
737 (or (math-realp calc-graph-yvalue)
738 (let ((math-arglist nil))
739 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
740 (calc-default-formula-arglist calc-graph-yvalue)
741 (setq math-arglist (sort math-arglist 'string-lessp))
742 (or (cdr math-arglist)
743 (error "%s does not contain enough unassigned variables" calc-graph-yname))
744 (and (cdr (cdr math-arglist))
745 (error "%s contains too many variables: %s" calc-graph-yname math-arglist))
746 (setq calc-graph-yvalue (math-multi-subst calc-graph-yvalue
747 (mapcar 'math-build-var-name
749 '((var DUMMY var-DUMMY)
750 (var DUMMY2 var-DUMMY2))))))
751 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
752 (setq calc-graph-numsteps (1- (length calc-graph-xvalue)))
753 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
754 (math-constp calc-graph-xvalue))
755 (setq calc-graph-numsteps calc-graph-resolution
756 calc-graph-xvalue (calcFunc-index calc-graph-numsteps
757 (nth 2 calc-graph-xvalue)
758 (math-div (math-sub (nth 3 calc-graph-xvalue)
759 (nth 2 calc-graph-xvalue))
760 (1- calc-graph-numsteps))))
761 (error "%s is not a suitable basis for %s"
762 calc-graph-xname calc-graph-yname)))
763 (if (eq (car-safe calc-graph-y3value) 'vec)
764 (setq calc-graph-numsteps3 (1- (length calc-graph-y3value)))
765 (if (and (eq (car-safe calc-graph-y3value) 'intv)
766 (math-constp calc-graph-y3value))
767 (setq calc-graph-numsteps3 calc-graph-resolution
768 calc-graph-y3value (calcFunc-index calc-graph-numsteps3
769 (nth 2 calc-graph-y3value)
770 (math-div (math-sub (nth 3 calc-graph-y3value)
771 (nth 2 calc-graph-y3value))
772 (1- calc-graph-numsteps3))))
773 (error "%s is not a suitable basis for %s"
774 calc-graph-y3name calc-graph-yname)))
775 (setq calc-graph-xp nil
779 (setq math-working-step 0)
780 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue))
781 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
782 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
783 calc-graph-zp (cons '(skip) calc-graph-zp)
784 calc-graph-y3step calc-graph-y3value
785 var-DUMMY (car calc-graph-xvalue)
786 math-working-step-2 0
787 math-working-step (1+ math-working-step))
788 (while (setq calc-graph-y3step (cdr calc-graph-y3step))
789 (setq math-working-step-2 (1+ math-working-step-2)
790 var-DUMMY2 (car calc-graph-y3step)
791 calc-graph-zp (cons (math-evaluate-expr calc-graph-yvalue) calc-graph-zp))))
792 (setq calc-graph-zp (nreverse calc-graph-zp)
793 calc-graph-numsteps (1- (* calc-graph-numsteps (1+ calc-graph-numsteps3))))))
795 (defun calc-graph-format-data ()
796 (if (math-contains-sdev-p calc-graph-yp)
797 (let ((yp calc-graph-yp))
798 (setq calc-graph-yp (cons 'vec (mapcar 'math-get-value (cdr yp))))
799 (setq calc-graph-zp (cons 'vec (mapcar 'math-get-sdev (cdr yp))))))
800 (while (<= (setq calc-graph-stepcount (1+ calc-graph-stepcount)) calc-graph-numsteps)
802 (setq calc-graph-xp (cdr calc-graph-xp)
803 calc-graph-xval (car calc-graph-xp)
804 calc-graph-yp (cdr calc-graph-yp)
805 calc-graph-yval (car calc-graph-yp)
806 calc-graph-zp (cdr calc-graph-zp)
807 calc-graph-zval (car calc-graph-zp))
809 (setq calc-graph-xval calc-graph-xvalue
810 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep)
811 calc-graph-yp (cdr calc-graph-yp)
812 calc-graph-yval (car calc-graph-yp))
813 (setq calc-graph-xval (car (car calc-graph-yp))
814 calc-graph-yval (cdr (car calc-graph-yp))
815 calc-graph-yp (cdr calc-graph-yp))
816 (if (or (not calc-graph-yp)
817 (and calc-graph-xhigh (equal calc-graph-xval calc-graph-xhigh)))
818 (setq calc-graph-numsteps 0))))
819 (if calc-graph-is-splot
820 (if (and (eq (car-safe calc-graph-zval) 'calcFunc-xyz)
821 (= (length calc-graph-zval) 4))
822 (setq calc-graph-xval (nth 1 calc-graph-zval)
823 calc-graph-yval (nth 2 calc-graph-zval)
824 calc-graph-zval (nth 3 calc-graph-zval)))
825 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xyz)
826 (= (length calc-graph-yval) 4))
828 (or calc-graph-surprise-splot
829 (with-current-buffer (get-buffer-create "*Gnuplot Temp*")
831 (goto-char (point-max))
832 (re-search-backward "^plot[ \t]")
833 (insert "set parametric\ns")
834 (setq calc-graph-surprise-splot t))))
835 (setq calc-graph-xval (nth 1 calc-graph-yval)
836 calc-graph-zval (nth 3 calc-graph-yval)
837 calc-graph-yval (nth 2 calc-graph-yval)))
838 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xy)
839 (= (length calc-graph-yval) 3))
840 (setq calc-graph-xval (nth 1 calc-graph-yval)
841 calc-graph-yval (nth 2 calc-graph-yval)))))
842 (if (and (Math-realp calc-graph-xval)
843 (Math-realp calc-graph-yval)
844 (or (not calc-graph-zval) (Math-realp calc-graph-zval)))
846 (setq calc-graph-blank nil
847 calc-graph-non-blank t)
848 (if (Math-integerp calc-graph-xval)
849 (insert (math-format-number calc-graph-xval))
850 (if (eq (car calc-graph-xval) 'frac)
851 (setq calc-graph-xval (math-float calc-graph-xval)))
852 (insert (math-format-number (nth 1 calc-graph-xval))
853 "e" (int-to-string (nth 2 calc-graph-xval))))
855 (if (Math-integerp calc-graph-yval)
856 (insert (math-format-number calc-graph-yval))
857 (if (eq (car calc-graph-yval) 'frac)
858 (setq calc-graph-yval (math-float calc-graph-yval)))
859 (insert (math-format-number (nth 1 calc-graph-yval))
860 "e" (int-to-string (nth 2 calc-graph-yval))))
864 (if (Math-integerp calc-graph-zval)
865 (insert (math-format-number calc-graph-zval))
866 (if (eq (car calc-graph-zval) 'frac)
867 (setq calc-graph-zval (math-float calc-graph-zval)))
868 (insert (math-format-number (nth 1 calc-graph-zval))
869 "e" (int-to-string (nth 2 calc-graph-zval))))))
871 (and (not (equal calc-graph-zval '(skip)))
872 (boundp 'var-PlotRejects)
873 (eq (car-safe var-PlotRejects) 'vec)
874 (nconc var-PlotRejects
878 calc-graph-xval calc-graph-yval)))
879 (calc-refresh-evaltos 'var-PlotRejects))
883 (setq calc-graph-blank t))))))
885 (defun calc-temp-file-name (num)
886 (while (<= (length calc-graph-file-cache) (1+ num))
887 (setq calc-graph-file-cache (nconc calc-graph-file-cache (list nil))))
888 (car (or (nth (1+ num) calc-graph-file-cache)
889 (setcar (nthcdr (1+ num) calc-graph-file-cache)
890 (list (make-temp-file
891 (concat calc-gnuplot-tempfile
893 (char-to-string (- ?A num))
894 (int-to-string num))))
897 (defun calc-graph-delete-temps ()
898 (while calc-graph-file-cache
899 (and (car calc-graph-file-cache)
900 (file-exists-p (car (car calc-graph-file-cache)))
902 (delete-file (car (car calc-graph-file-cache)))
904 (setq calc-graph-file-cache (cdr calc-graph-file-cache))))
906 (defun calc-graph-kill-hook ()
907 (calc-graph-delete-temps))
909 (defun calc-graph-show-tty (output)
910 "Default calc-gnuplot-plot-command for \"tty\" output mode.
911 This is useful for tek40xx and other graphics-terminal types."
912 (call-process-region 1 1 shell-file-name
913 nil calc-gnuplot-buffer nil
914 "-c" (format "cat %s >/dev/tty; rm %s" output output)))
916 (defvar calc-dumb-map nil
917 "The keymap for the \"dumb\" terminal plot.")
919 (defun calc-graph-show-dumb (&optional output)
920 "Default calc-gnuplot-plot-command for Pinard's \"dumb\" terminal type.
921 This \"dumb\" driver will be present in Gnuplot 3.0."
923 (save-window-excursion
924 (switch-to-buffer calc-gnuplot-buffer)
925 (delete-other-windows)
926 (goto-char calc-gnuplot-trail-mark)
927 (or (search-forward "\f" nil t)
929 (goto-char (point-max))
930 (re-search-backward "\f\\|^[ \t]+\\^$\\|G N U P L O T")
931 (if (looking-at "\f")
934 (if (eolp) (forward-line 1))
935 (or (calc-graph-find-command "time")
936 (calc-graph-find-command "title")
937 (calc-graph-find-command "ylabel")
939 (insert-before-markers (format "(%s)" (current-time-string)))
941 (set-window-start (selected-window) (point))
942 (goto-char (point-max)))
948 (setq calc-dumb-map (make-sparse-keymap))
949 (define-key calc-dumb-map "\n" 'scroll-up-command)
950 (define-key calc-dumb-map " " 'scroll-up-command)
951 (define-key calc-dumb-map [?\S-\ ] 'scroll-down-command)
952 (define-key calc-dumb-map "\177" 'scroll-down-command)
953 (define-key calc-dumb-map "<" 'scroll-left)
954 (define-key calc-dumb-map ">" 'scroll-right)
955 (define-key calc-dumb-map "{" 'scroll-down-command)
956 (define-key calc-dumb-map "}" 'scroll-up-command)
957 (define-key calc-dumb-map "q" 'exit-recursive-edit)
958 (define-key calc-dumb-map "\C-c\C-c" 'exit-recursive-edit)))
959 (use-local-map calc-dumb-map)
960 (setq truncate-lines t)
961 (message "Type `q' or `C-c C-c' to return to Calc")
963 (bury-buffer "*Gnuplot Trail*")))
965 (defun calc-graph-clear ()
967 (if calc-graph-last-device
968 (if (or (equal calc-graph-last-device "x11")
969 (equal calc-graph-last-device "X11"))
970 (calc-gnuplot-command "set output"
971 (if (equal calc-graph-last-output "STDOUT")
973 (prin1-to-string calc-graph-last-output)))
974 (calc-gnuplot-command "clear"))))
976 (defun calc-graph-title-x (title)
977 (interactive "sX axis title: ")
978 (calc-graph-set-command "xlabel" (if (not (equal title ""))
979 (prin1-to-string title))))
981 (defun calc-graph-title-y (title)
982 (interactive "sY axis title: ")
983 (calc-graph-set-command "ylabel" (if (not (equal title ""))
984 (prin1-to-string title))))
986 (defun calc-graph-title-z (title)
987 (interactive "sZ axis title: ")
988 (calc-graph-set-command "zlabel" (if (not (equal title ""))
989 (prin1-to-string title))))
991 (defun calc-graph-range-x (range)
992 (interactive "sX axis range: ")
993 (calc-graph-set-range "xrange" range))
995 (defun calc-graph-range-y (range)
996 (interactive "sY axis range: ")
997 (calc-graph-set-range "yrange" range))
999 (defun calc-graph-range-z (range)
1000 (interactive "sZ axis range: ")
1001 (calc-graph-set-range "zrange" range))
1003 (defun calc-graph-set-range (cmd range)
1004 (if (equal range "$")
1006 (let ((val (calc-top-n 1)))
1007 (if (and (eq (car-safe val) 'intv) (math-constp val))
1009 (math-format-number (math-float (nth 2 val))) ":"
1010 (math-format-number (math-float (nth 3 val)))))
1011 (if (and (eq (car-safe val) 'vec)
1014 (math-format-number (math-float (nth 1 val))) ":"
1015 (math-format-number (math-float (nth 2 val)))))
1016 (error "Range specification must be an interval or 2-vector")))
1017 (calc-pop-stack 1))))
1018 (if (string-match "\\[.+\\]" range)
1019 (setq range (substring range 1 -1)))
1020 (if (and (not (string-match ":" range))
1021 (or (string-match "," range)
1022 (string-match " " range)))
1023 (aset range (match-beginning 0) ?\:))
1024 (calc-graph-set-command cmd (if (not (equal range ""))
1025 (concat "[" range "]"))))
1027 (defun calc-graph-log-x (flag)
1029 (calc-graph-set-log flag 0 0))
1031 (defun calc-graph-log-y (flag)
1033 (calc-graph-set-log 0 flag 0))
1035 (defun calc-graph-log-z (flag)
1037 (calc-graph-set-log 0 0 flag))
1039 (defun calc-graph-set-log (xflag yflag zflag)
1040 (let* ((old (or (calc-graph-find-command "logscale") ""))
1041 (xold (string-match "x" old))
1042 (yold (string-match "y" old))
1043 (zold (string-match "z" old))
1045 (setq str (concat (if (if xflag
1046 (if (eq xflag 0) xold
1047 (> (prefix-numeric-value xflag) 0))
1050 (if (eq yflag 0) yold
1051 (> (prefix-numeric-value yflag) 0))
1054 (if (eq zflag 0) zold
1055 (> (prefix-numeric-value zflag) 0))
1056 (not zold)) "z" "")))
1057 (calc-graph-set-command "logscale" (if (not (equal str "")) str))))
1059 (defun calc-graph-line-style (style)
1061 (calc-graph-set-styles (and style (prefix-numeric-value style)) t))
1063 (defun calc-graph-point-style (style)
1065 (calc-graph-set-styles t (and style (prefix-numeric-value style))))
1067 (defun calc-graph-set-styles (lines points &optional yerr)
1069 (with-current-buffer calc-gnuplot-input
1070 (or (calc-graph-find-plot nil nil)
1071 (error "No data points have been set!"))
1072 (let ((base (point))
1073 (mode nil) (lstyle nil) (pstyle nil)
1074 start end lenbl penbl errform)
1075 (re-search-forward "[,\n]")
1077 (setq end (point) start end)
1079 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+with\\)")
1081 (setq start (match-beginning 1))
1082 (goto-char (match-end 0))
1083 (if (looking-at "[ \t]+\\([a-z]+\\)")
1084 (setq mode (buffer-substring (match-beginning 1)
1086 (if (looking-at "[ \ta-z]+\\([0-9]+\\)")
1087 (setq lstyle (string-to-number
1088 (buffer-substring (match-beginning 1)
1090 (if (looking-at "[ \ta-z]+[0-9]+[ \t]+\\([0-9]+\\)")
1091 (setq pstyle (string-to-number
1092 (buffer-substring (match-beginning 1)
1095 (setq lenbl (or (equal mode "lines")
1096 (equal mode "linespoints"))
1097 penbl (or (equal mode "points")
1098 (equal mode "linespoints")))
1102 lenbl (>= lines 0)))
1103 (setq lenbl (not lenbl)))
1107 penbl (>= points 0)))
1108 (setq penbl (not penbl))))
1109 (delete-region start end)
1113 (math-contains-sdev-p
1117 (re-search-backward ":\\(.*\\)\\}")
1118 (match-string 1))))))
1121 (insert " with yerrorbars")
1128 (if penbl "linespoints" "lines")
1129 (if penbl "points" "dots"))))
1130 (if (and pstyle (> pstyle 0))
1132 (if (and lstyle (> lstyle 0)) (int-to-string lstyle) "1")
1133 " " (int-to-string pstyle))
1134 (if (and lstyle (> lstyle 0))
1135 (insert " " (int-to-string lstyle)))))))
1136 (calc-graph-view-commands))
1138 (defun calc-graph-zero-x (flag)
1140 (calc-graph-set-command "noxzeroaxis"
1142 (<= (prefix-numeric-value flag) 0)
1143 (not (calc-graph-find-command "noxzeroaxis")))
1146 (defun calc-graph-zero-y (flag)
1148 (calc-graph-set-command "noyzeroaxis"
1150 (<= (prefix-numeric-value flag) 0)
1151 (not (calc-graph-find-command "noyzeroaxis")))
1154 (defun calc-graph-name (name)
1155 (interactive "sTitle for current curve: ")
1157 (with-current-buffer calc-gnuplot-input
1158 (or (calc-graph-find-plot nil nil)
1159 (error "No data points have been set!"))
1160 (let ((base (point))
1163 (re-search-forward "[,\n]\\|[ \t]+with")
1164 (setq end (match-beginning 0))
1166 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+title\\)")
1168 (goto-char (match-beginning 1))
1169 (delete-region (point) end))
1171 (insert " title " (prin1-to-string name))))
1172 (calc-graph-view-commands))
1174 (defun calc-graph-hide (flag)
1177 (and (calc-graph-find-plot nil nil)
1179 (or (looking-at "{")
1180 (error "Can't hide this curve (wrong format)"))
1182 (if (looking-at "*")
1183 (if (or (null flag) (<= (prefix-numeric-value flag) 0))
1185 (if (or (null flag) (> (prefix-numeric-value flag) 0))
1188 (defun calc-graph-header (title)
1189 (interactive "sTitle for entire graph: ")
1190 (calc-graph-set-command "title" (if (not (equal title ""))
1191 (prin1-to-string title))))
1193 (defun calc-graph-border (flag)
1195 (calc-graph-set-command "noborder"
1197 (<= (prefix-numeric-value flag) 0)
1198 (not (calc-graph-find-command "noborder")))
1201 (defun calc-graph-grid (flag)
1203 (calc-graph-set-command "grid" (and (if flag
1204 (> (prefix-numeric-value flag) 0)
1205 (not (calc-graph-find-command "grid")))
1208 (defun calc-graph-key (flag)
1210 (calc-graph-set-command "key" (and (if flag
1211 (> (prefix-numeric-value flag) 0)
1212 (not (calc-graph-find-command "key")))
1215 (defun calc-graph-num-points (res flag)
1216 (interactive "sNumber of data points: \nP")
1218 (if (> (prefix-numeric-value flag) 0)
1220 (message "Default resolution is %d"
1221 calc-graph-default-resolution)
1222 (setq calc-graph-default-resolution (string-to-number res)))
1224 (message "Default 3D resolution is %d"
1225 calc-graph-default-resolution-3d)
1226 (setq calc-graph-default-resolution-3d (string-to-number res))))
1227 (calc-graph-set-command "samples" (if (not (equal res "")) res))))
1229 (defun calc-graph-device (name flag)
1230 (interactive "sDevice name: \nP")
1231 (if (equal name "?")
1233 (calc-gnuplot-command "set terminal")
1234 (calc-graph-view-trail))
1236 (if (> (prefix-numeric-value flag) 0)
1238 (message "Default GNUPLOT device is \"%s\""
1239 calc-gnuplot-default-device)
1240 (setq calc-gnuplot-default-device name))
1242 (message "GNUPLOT device for Print command is \"%s\""
1243 calc-gnuplot-print-device)
1244 (setq calc-gnuplot-print-device name)))
1245 (calc-graph-set-command "terminal" (if (not (equal name ""))
1248 (defun calc-graph-output (name flag)
1249 (interactive "FOutput file name: \np")
1250 (cond ((string-match "\\<[aA][uU][tT][oO]$" name)
1252 ((string-match "\\<[tT][tT][yY]$" name)
1254 ((string-match "\\<[sS][tT][dD][oO][uU][tT]$" name)
1255 (setq name "STDOUT"))
1256 ((equal (file-name-nondirectory name) "")
1258 (t (setq name (expand-file-name name))))
1260 (if (> (prefix-numeric-value flag) 0)
1262 (message "Default GNUPLOT output file is \"%s\""
1263 calc-gnuplot-default-output)
1264 (setq calc-gnuplot-default-output name))
1266 (message "GNUPLOT output file for Print command is \"%s\""
1267 calc-gnuplot-print-output)
1268 (setq calc-gnuplot-print-output name)))
1269 (calc-graph-set-command "output" (if (not (equal name ""))
1270 (prin1-to-string name)))))
1272 (defun calc-graph-display (name)
1273 (interactive "sX display name: ")
1275 (message "Current X display is \"%s\""
1276 (or calc-gnuplot-display "<none>"))
1277 (setq calc-gnuplot-display name)
1278 (if (calc-gnuplot-alive)
1279 (calc-gnuplot-command "exit"))))
1281 (defun calc-graph-geometry (name)
1282 (interactive "sX geometry spec (or \"default\"): ")
1284 (message "Current X geometry is \"%s\""
1285 (or calc-gnuplot-geometry "default"))
1286 (setq calc-gnuplot-geometry (and (not (equal name "default")) name))
1287 (if (calc-gnuplot-alive)
1288 (calc-gnuplot-command "exit"))))
1290 (defun calc-graph-find-command (cmd)
1292 (with-current-buffer calc-gnuplot-input
1293 (goto-char (point-min))
1294 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t]*\\(.*\\)$") nil t)
1295 (buffer-substring (match-beginning 1) (match-end 1)))))
1297 (defun calc-graph-set-command (cmd &rest args)
1299 (with-current-buffer calc-gnuplot-input
1300 (goto-char (point-min))
1301 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t\n]") nil t)
1305 (let ((end (point)))
1307 (delete-region (point) (1+ end))))
1308 (if (calc-graph-find-plot t t)
1309 (if (eq (preceding-char) ?\n)
1311 (goto-char (1- (point-max)))))
1312 (if (and args (car args))
1316 (insert "set " (mapconcat 'identity (cons cmd args) " ") "\n"))))
1317 (calc-graph-view-commands))
1319 (defun calc-graph-command (cmd)
1320 (interactive "sGNUPLOT command: ")
1323 (calc-graph-view-trail)
1324 (calc-gnuplot-command cmd)
1325 (or (string= calc-gnuplot-name "pgnuplot")
1327 (accept-process-output)
1328 (calc-graph-view-trail)))))
1330 (defun calc-graph-kill (&optional no-view)
1332 (calc-graph-delete-temps)
1333 (if (calc-gnuplot-alive)
1335 (or no-view (calc-graph-view-trail))
1336 (let ((calc-graph-no-wait t))
1337 (calc-gnuplot-command "exit"))
1339 (if (process-status calc-gnuplot-process)
1340 (delete-process calc-gnuplot-process))
1341 (setq calc-gnuplot-process nil))))
1343 (defun calc-graph-quit ()
1345 (if (get-buffer-window calc-gnuplot-input)
1346 (calc-graph-view-commands t))
1347 (if (get-buffer-window calc-gnuplot-buffer)
1348 (calc-graph-view-trail t))
1349 (calc-graph-kill t))
1351 (defun calc-graph-view-commands (&optional no-need)
1353 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1354 (calc-graph-view calc-gnuplot-input calc-gnuplot-buffer (null no-need)))
1356 (defun calc-graph-view-trail (&optional no-need)
1358 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1359 (calc-graph-view calc-gnuplot-buffer calc-gnuplot-input (null no-need)))
1361 (defun calc-graph-view (buf other-buf need)
1363 (or calc-graph-no-auto-view
1364 (if (setq win (get-buffer-window buf))
1366 (and (eq buf calc-gnuplot-buffer)
1367 (with-current-buffer buf
1368 (not (pos-visible-in-window-p (point-max) win))))
1371 (bury-buffer other-buf)
1372 (let ((curwin (selected-window)))
1374 (switch-to-buffer nil)
1375 (select-window curwin))))
1376 (if (setq win (get-buffer-window other-buf))
1377 (set-window-buffer win buf)
1378 (if (eq major-mode 'calc-mode)
1380 (not (window-full-height-p)))
1381 (display-buffer buf))
1382 (switch-to-buffer buf)))))
1383 (with-current-buffer buf
1384 (if (and (eq buf calc-gnuplot-buffer)
1385 (setq win (get-buffer-window buf))
1386 (not (pos-visible-in-window-p (point-max) win)))
1388 (goto-char (point-max))
1389 (vertical-motion (- 6 (window-height win)))
1390 (set-window-start win (point))
1391 (goto-char (point-max)))))
1392 (or calc-graph-no-auto-view (sit-for 0))))
1394 (defun calc-gnuplot-check-for-errors ()
1398 (set-buffer calc-gnuplot-buffer)
1399 (goto-char calc-gnuplot-last-error-pos))
1400 (re-search-forward "^[ \t]+\\^$" nil t)
1401 (goto-char (point-max))
1402 (setq calc-gnuplot-last-error-pos (point-max))))
1403 (calc-graph-view-trail)))
1405 (defun calc-gnuplot-command (&rest args)
1407 (let ((cmd (concat (mapconcat 'identity args " ") "\n")))
1408 (or (string= calc-gnuplot-name "pgnuplot")
1409 (accept-process-output))
1410 (with-current-buffer calc-gnuplot-buffer
1411 (calc-gnuplot-check-for-errors)
1412 (goto-char (point-max))
1413 (setq calc-gnuplot-trail-mark (point))
1414 (or (>= calc-gnuplot-version 3)
1416 (set-marker (process-mark calc-gnuplot-process) (point))
1417 (process-send-string calc-gnuplot-process cmd)
1418 (if (get-buffer-window calc-gnuplot-buffer)
1419 (calc-graph-view-trail))
1420 (or (string= calc-gnuplot-name "pgnuplot")
1421 (accept-process-output (and (not calc-graph-no-wait)
1422 calc-gnuplot-process)))
1423 (calc-gnuplot-check-for-errors)
1424 (if (get-buffer-window calc-gnuplot-buffer)
1425 (calc-graph-view-trail)))))
1427 (defun calc-graph-init-buffers ()
1428 (or (and calc-gnuplot-buffer
1429 (buffer-name calc-gnuplot-buffer))
1430 (setq calc-gnuplot-buffer (get-buffer-create "*Gnuplot Trail*")))
1431 (or (and calc-gnuplot-input
1432 (buffer-name calc-gnuplot-input))
1433 (setq calc-gnuplot-input (get-buffer-create "*Gnuplot Commands*"))))
1435 (defun calc-graph-init ()
1436 (or (calc-gnuplot-alive)
1437 (let ((process-connection-type t)
1439 (if calc-gnuplot-process
1441 (delete-process calc-gnuplot-process)
1442 (setq calc-gnuplot-process nil)))
1443 (calc-graph-init-buffers)
1444 (with-current-buffer calc-gnuplot-buffer
1445 (insert "\nStarting gnuplot...\n")
1446 (setq origin (point)))
1447 (setq calc-graph-last-device nil)
1448 (setq calc-graph-last-output nil)
1449 (if (string= calc-gnuplot-name "pgnuplot")
1450 (let ((version-str (shell-command-to-string "pgnuplot -V")))
1451 (if (string-match "gnuplot \\([0-9]+\\)\\." version-str)
1452 (setq calc-gnuplot-version (string-to-number
1453 (substring version-str
1456 (setq calc-gnuplot-version 1))))
1458 (let ((args (append (and calc-gnuplot-display
1459 (not (equal calc-gnuplot-display
1460 (getenv "DISPLAY")))
1461 (not (string= calc-gnuplot-name "pgnuplot"))
1463 calc-gnuplot-display))
1464 (and calc-gnuplot-geometry
1465 (not (string= calc-gnuplot-name "pgnuplot"))
1467 calc-gnuplot-geometry)))))
1468 (setq calc-gnuplot-process
1469 (apply 'start-process
1474 (set-process-query-on-exit-flag calc-gnuplot-process nil))
1476 (error "Sorry, can't find \"%s\" on your system"
1477 calc-gnuplot-name)))
1478 (with-current-buffer calc-gnuplot-buffer
1479 (while (and (not (string= calc-gnuplot-name "pgnuplot"))
1480 (not (save-excursion
1482 (search-forward "gnuplot> " nil t)))
1483 (memq (process-status calc-gnuplot-process) '(run stop)))
1484 (accept-process-output calc-gnuplot-process))
1485 (or (memq (process-status calc-gnuplot-process) '(run stop))
1486 (error "Unable to start GNUPLOT process"))
1487 (if (not (string= calc-gnuplot-name "pgnuplot"))
1491 "G N U P L O T.*\n.*version \\([0-9]+\\)\\." nil t))
1492 (setq calc-gnuplot-version
1493 (string-to-number (buffer-substring
1496 (setq calc-gnuplot-version 1)))
1497 (goto-char (point-max)))))
1498 (with-current-buffer calc-gnuplot-input
1499 (if (= (buffer-size) 0)
1500 (insert "# Commands for running gnuplot\n\n\n")
1501 (or calc-graph-no-auto-view
1502 (eq (char-after (1- (point-max))) ?\n)
1504 (goto-char (point-max))
1507 (provide 'calc-graph)
1509 ;;; calc-graph.el ends here