1 ;;; calc-graph.el --- graph output functions for Calc
3 ;; Copyright (C) 1990-1993, 2001-2016 Free Software Foundation, Inc.
5 ;; Author: David Gillespie <daveg@synaptics.com>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software: you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation, either version 3 of the License, or
12 ;; (at your option) any later version.
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; This file is autoloaded from calc-ext.el.
33 ;; The following three variables are customizable and defined in calc.el.
34 (defvar calc-gnuplot-name)
35 (defvar calc-gnuplot-plot-command)
36 (defvar calc-gnuplot-print-command)
38 (defvar calc-gnuplot-tempfile "calc")
40 (defvar calc-gnuplot-default-device)
41 (defvar calc-gnuplot-default-output)
42 (defvar calc-gnuplot-print-device)
43 (defvar calc-gnuplot-print-output)
44 (defvar calc-gnuplot-keep-outfile nil)
45 (defvar calc-gnuplot-version nil)
47 (defvar calc-gnuplot-display (getenv "DISPLAY"))
48 (defvar calc-gnuplot-geometry)
50 (defvar calc-graph-default-resolution)
51 (defvar calc-graph-default-resolution-3d)
52 (defvar calc-graph-default-precision 5)
54 (defvar calc-gnuplot-buffer nil)
55 (defvar calc-gnuplot-input nil)
57 (defvar calc-gnuplot-last-error-pos 1)
58 (defvar calc-graph-last-device nil)
59 (defvar calc-graph-last-output nil)
60 (defvar calc-graph-file-cache nil)
61 (defvar calc-graph-var-cache nil)
62 (defvar calc-graph-data-cache nil)
63 (defvar calc-graph-data-cache-limit 10)
64 (defvar calc-graph-no-auto-view nil)
65 (defvar calc-graph-no-wait nil)
66 (defvar calc-gnuplot-trail-mark)
68 (defun calc-graph-fast (many)
70 (let ((calc-graph-no-auto-view t))
73 (calc-graph-plot nil)))
75 (defun calc-graph-fast-3d (many)
77 (let ((calc-graph-no-auto-view t))
79 (calc-graph-add-3d many)
80 (calc-graph-plot nil)))
82 (defun calc-graph-delete (all)
86 (with-current-buffer calc-gnuplot-input
87 (and (calc-graph-find-plot t all)
89 (if (looking-at "s?plot")
91 (setq calc-graph-var-cache nil)
92 (delete-region (point) (point-max)))
93 (delete-region (point) (1- (point-max)))))))
94 (calc-graph-view-commands)))
96 (defun calc-graph-find-plot (&optional before all)
97 (goto-char (point-min))
98 (and (re-search-forward "^s?plot[ \t]+" nil t)
100 (goto-char (point-max))
102 (not (search-backward "," nil t))
107 (beginning-of-line)))
109 (re-search-forward ",[ \t]+")))
112 (defun calc-graph-add (many)
117 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 2))
118 (calc-graph-lookup (calc-top-n 1))))
119 ((or (consp many) (eq many 0))
120 (let ((xdata (calc-graph-lookup (calc-top-n 2)))
121 (ylist (calc-top-n 1)))
122 (or (eq (car-safe ylist) 'vec)
123 (error "Y argument must be a vector"))
124 (while (setq ylist (cdr ylist))
125 (calc-graph-add-curve xdata (calc-graph-lookup (car ylist))))))
126 ((> (setq many (prefix-numeric-value many)) 0)
127 (let ((xdata (calc-graph-lookup (calc-top-n (1+ many)))))
129 (calc-graph-add-curve xdata
130 (calc-graph-lookup (calc-top-n many)))
131 (setq many (1- many)))))
136 (setq pair (calc-top-n many))
137 (or (and (eq (car-safe pair) 'vec)
139 (error "Argument must be an [x,y] vector"))
140 (calc-graph-add-curve (calc-graph-lookup (nth 1 pair))
141 (calc-graph-lookup (nth 2 pair)))
142 (setq many (1- many))))))
143 (calc-graph-view-commands)))
145 (defun calc-graph-add-3d (many)
150 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 3))
151 (calc-graph-lookup (calc-top-n 2))
152 (calc-graph-lookup (calc-top-n 1))))
153 ((or (consp many) (eq many 0))
154 (let ((xdata (calc-graph-lookup (calc-top-n 3)))
155 (ydata (calc-graph-lookup (calc-top-n 2)))
156 (zlist (calc-top-n 1)))
157 (or (eq (car-safe zlist) 'vec)
158 (error "Z argument must be a vector"))
159 (while (setq zlist (cdr zlist))
160 (calc-graph-add-curve xdata ydata
161 (calc-graph-lookup (car zlist))))))
162 ((> (setq many (prefix-numeric-value many)) 0)
163 (let ((xdata (calc-graph-lookup (calc-top-n (+ many 2))))
164 (ydata (calc-graph-lookup (calc-top-n (+ many 1)))))
166 (calc-graph-add-curve xdata ydata
167 (calc-graph-lookup (calc-top-n many)))
168 (setq many (1- many)))))
173 (setq curve (calc-top-n many))
174 (or (and (eq (car-safe curve) 'vec)
175 (= (length curve) 4))
176 (error "Argument must be an [x,y,z] vector"))
177 (calc-graph-add-curve (calc-graph-lookup (nth 1 curve))
178 (calc-graph-lookup (nth 2 curve))
179 (calc-graph-lookup (nth 3 curve)))
180 (setq many (1- many))))))
181 (calc-graph-view-commands)))
183 (defun calc-graph-add-curve (xdata ydata &optional zdata)
184 (let ((num (calc-graph-count-curves))
185 (pstyle (calc-var-value 'var-PointStyles))
186 (lstyle (calc-var-value 'var-LineStyles)))
187 (with-current-buffer calc-gnuplot-input
188 (goto-char (point-min))
189 (if (re-search-forward (if zdata "^plot[ \t]" "^splot[ \t]")
191 (error "Can't mix 2d and 3d curves on one graph"))
192 (if (re-search-forward "^s?plot[ \t]" nil t)
196 (goto-char (point-max))
197 (or (eq (preceding-char) ?\n)
199 (insert (if zdata "splot" "plot") " \n")
201 (insert "{" (symbol-name (nth 1 xdata))
202 ":" (symbol-name (nth 1 ydata)))
204 (insert ":" (symbol-name (nth 1 zdata))))
206 "title \"" (symbol-name (nth 1 ydata)) "\" "
208 (setq pstyle (and (eq (car-safe pstyle) 'vec) (nth (1+ num) pstyle)))
209 (setq lstyle (and (eq (car-safe lstyle) 'vec) (nth (1+ num) lstyle))))
210 (calc-graph-set-styles
211 (or (and (Math-num-integerp lstyle) (math-trunc lstyle))
213 (or (and (Math-num-integerp pstyle) (math-trunc pstyle))
214 (if (eq (car-safe (calc-var-value (nth 2 ydata))) 'vec)
216 (math-contains-sdev-p (eval (nth 2 ydata))))))
218 (defun calc-graph-lookup (thing)
219 (if (and (eq (car-safe thing) 'var)
220 (calc-var-value (nth 2 thing)))
222 (let ((found (assoc thing calc-graph-var-cache)))
224 (let ((varname (concat "PlotData"
226 (1+ (length calc-graph-var-cache)))))
228 (setq var (list 'var (intern varname)
229 (intern (concat "var-" varname)))
230 found (cons thing var)
231 calc-graph-var-cache (cons found calc-graph-var-cache))
232 (set (nth 2 var) thing)))
235 (defun calc-graph-juggle (arg)
238 (with-current-buffer calc-gnuplot-input
240 (let ((num (calc-graph-count-curves)))
243 (setq arg (+ arg num))))))
244 (while (>= (setq arg (1- arg)) 0)
245 (calc-graph-do-juggle))))
247 (defun calc-graph-count-curves ()
248 (with-current-buffer calc-gnuplot-input
249 (if (re-search-forward "^s?plot[ \t]" nil t)
251 (goto-char (point-min))
252 (while (search-forward "," nil t)
257 (defun calc-graph-do-juggle ()
259 (and (calc-graph-find-plot t t)
262 (calc-graph-find-plot t nil)
263 (or (eq base (point))
264 (let ((str (buffer-substring (+ (point) 2) (1- (point-max)))))
265 (delete-region (point) (1- (point-max)))
266 (goto-char (+ base 5))
267 (insert str ", ")))))))
269 (defun calc-graph-print (flag)
271 (calc-graph-plot flag t))
275 (defvar var-PlotRejects)
277 ;; The following variables are local to calc-graph-plot, but are
278 ;; used in the functions calc-graph-compute-2d, calc-graph-refine-2d,
279 ;; calc-graph-recompute-2d, calc-graph-compute-3d and
280 ;; calc-graph-format-data, which are called by calc-graph-plot.
281 (defvar calc-graph-yvalue)
282 (defvar calc-graph-yvec)
283 (defvar calc-graph-numsteps)
284 (defvar calc-graph-numsteps3)
285 (defvar calc-graph-xvalue)
286 (defvar calc-graph-xvec)
287 (defvar calc-graph-xname)
288 (defvar calc-graph-yname)
289 (defvar calc-graph-xstep)
290 (defvar calc-graph-ycache)
291 (defvar calc-graph-ycacheptr)
292 (defvar calc-graph-refine)
293 (defvar calc-graph-keep-file)
294 (defvar calc-graph-xval)
295 (defvar calc-graph-xlow)
296 (defvar calc-graph-xhigh)
297 (defvar calc-graph-yval)
298 (defvar calc-graph-yp)
299 (defvar calc-graph-xp)
300 (defvar calc-graph-zp)
301 (defvar calc-graph-yvector)
302 (defvar calc-graph-resolution)
303 (defvar calc-graph-y3value)
304 (defvar calc-graph-y3name)
305 (defvar calc-graph-y3step)
306 (defvar calc-graph-zval)
307 (defvar calc-graph-stepcount)
308 (defvar calc-graph-is-splot)
309 (defvar calc-graph-surprise-splot)
310 (defvar calc-graph-blank)
311 (defvar calc-graph-non-blank)
312 (defvar calc-graph-curve-num)
314 (defun calc-graph-plot (flag &optional printing)
317 (let ((calcbuf (current-buffer))
318 (tempbuf (get-buffer-create "*Gnuplot Temp-2*"))
321 (calc-graph-curve-num 0)
322 (calc-graph-refine (and flag (> (prefix-numeric-value flag) 0)))
323 (recompute (and flag (< (prefix-numeric-value flag) 0)))
324 (calc-graph-surprise-splot nil)
326 cache-env calc-graph-is-splot device output calc-graph-resolution precision samples-pos)
327 (add-hook 'kill-emacs-hook 'calc-graph-kill-hook)
332 (set-buffer calc-gnuplot-input)
333 (goto-char (point-min))
334 (setq calc-graph-is-splot (re-search-forward "^splot[ \t]" nil t))
335 (let ((str (buffer-string))
336 (ver calc-gnuplot-version))
337 (set-buffer (get-buffer-create "*Gnuplot Temp*"))
339 (insert "# (Note: This is a temporary copy---do not edit!)\n")
341 (insert "set noarrow\nset nolabel\n"
342 "set autoscale xy\nset nologscale xy\n"
343 "set xlabel\nset ylabel\nset title\n"
344 "set noclip points\nset clip one\nset clip two\n"
345 "set format \"%g\"\nset tics\nset xtics\nset ytics\n"
346 "set style data linespoints\n"
347 "set nogrid\nset nokey\nset nopolar\n"))
349 (insert "set surface\nset nocontour\n"
350 "set " (if calc-graph-is-splot "" "no") "parametric\n"
351 "set notime\nset border\nset ztics\nset zeroaxis\n"
352 "set view 60,30,1,1\nset offsets 0,0,0,0\n"))
353 (setq samples-pos (point))
355 (goto-char (point-min))
356 (if calc-graph-is-splot
357 (if calc-graph-refine
358 (error "This option works only for 2d plots")
360 (let ((calc-gnuplot-input (current-buffer))
361 (calc-graph-no-auto-view t))
363 (setq device calc-gnuplot-print-device
364 output calc-gnuplot-print-output)
365 (setq device (calc-graph-find-command "terminal")
366 output (calc-graph-find-command "output"))
368 (setq device calc-gnuplot-default-device))
370 (setq output (car (read-from-string output)))
371 (setq output calc-gnuplot-default-output)))
372 (if (or (equal device "") (equal device "default"))
375 (printing "postscript")
376 ;; Check MS-Windows before X, in case they have
377 ;; $DISPLAY set for some reason (e.g., Cygwin or
379 ((string= calc-gnuplot-name "pgnuplot")
381 ((or (eq window-system 'x) (getenv "DISPLAY"))
383 ((>= calc-gnuplot-version 3)
386 (if (equal device "dumb")
387 (setq device (format "dumb %d %d"
388 (1- (frame-width)) (1- (frame-height)))))
389 (if (equal device "big")
390 (setq device (format "dumb %d %d"
391 (* 4 (- (frame-width) 3))
392 (* 4 (- (frame-height) 3)))))
394 (if (or (equal output "auto")
395 (and (equal output "tty") (setq tty-output t)))
396 (setq tempoutfile (calc-temp-file-name -1)
398 (setq output (eval output)))
399 (or (equal device calc-graph-last-device)
401 (setq calc-graph-last-device device)
402 (calc-gnuplot-command "set terminal" device)))
403 (or (equal output calc-graph-last-output)
405 (setq calc-graph-last-output output)
406 (calc-gnuplot-command "set output"
407 (if (equal output "STDOUT")
409 (prin1-to-string output)))))
410 (setq calc-graph-resolution (calc-graph-find-command "samples"))
411 (if calc-graph-resolution
412 (setq calc-graph-resolution (string-to-number calc-graph-resolution))
413 (setq calc-graph-resolution (if calc-graph-is-splot
414 calc-graph-default-resolution-3d
415 calc-graph-default-resolution)))
416 (setq precision (calc-graph-find-command "precision"))
418 (setq precision (string-to-number precision))
419 (setq precision calc-graph-default-precision))
420 (calc-graph-set-command "terminal")
421 (calc-graph-set-command "output")
422 (calc-graph-set-command "samples")
423 (calc-graph-set-command "precision"))
424 (goto-char samples-pos)
425 (insert "set samples " (int-to-string (max (if calc-graph-is-splot 20 200)
426 (+ 5 calc-graph-resolution))) "\n")
427 (while (re-search-forward "{\\*[^}]+}[^,\n]*" nil t)
428 (delete-region (match-beginning 0) (match-end 0))
431 (while (memq (preceding-char) '(?\s ?\t))
433 (if (eq (preceding-char) ?\,)
435 (with-current-buffer calcbuf
436 (setq cache-env (list calc-angle-mode
441 precision calc-graph-is-splot))
442 (if (and (not recompute)
443 (equal (cdr (car calc-graph-data-cache)) cache-env))
444 (while (> (length calc-graph-data-cache)
445 calc-graph-data-cache-limit)
446 (setcdr calc-graph-data-cache
447 (cdr (cdr calc-graph-data-cache))))
448 (setq calc-graph-data-cache (list (cons nil cache-env)))))
449 (calc-graph-find-plot t t)
450 (while (re-search-forward
451 (if calc-graph-is-splot
452 "{\\([^{}:\n]+\\):\\([^{}:\n]+\\):\\([^{}:\n]+\\)}"
453 "{\\([^{}:\n]+\\)\\(:\\)\\([^{}:\n]+\\)}")
455 (setq calc-graph-curve-num (1+ calc-graph-curve-num))
456 (let* ((calc-graph-xname (buffer-substring (match-beginning 1) (match-end 1)))
457 (xvar (intern (concat "var-" calc-graph-xname)))
458 (calc-graph-xvalue (math-evaluate-expr (calc-var-value xvar)))
459 (calc-graph-y3name (and calc-graph-is-splot
460 (buffer-substring (match-beginning 2)
462 (y3var (and calc-graph-is-splot (intern (concat "var-" calc-graph-y3name))))
463 (calc-graph-y3value (and calc-graph-is-splot (calc-var-value y3var)))
464 (calc-graph-yname (buffer-substring (match-beginning 3) (match-end 3)))
465 (yvar (intern (concat "var-" calc-graph-yname)))
466 (calc-graph-yvalue (calc-var-value yvar))
468 (delete-region (match-beginning 0) (match-end 0))
469 (setq filename (calc-temp-file-name calc-graph-curve-num))
470 (with-current-buffer calcbuf
472 (calc-graph-xp calc-graph-xvalue)
473 (calc-graph-yp calc-graph-yvalue)
475 (calc-graph-xlow nil) (calc-graph-xhigh nil) (y3low nil) (y3high nil)
476 calc-graph-xvec calc-graph-xval calc-graph-xstep var-DUMMY
477 y3val calc-graph-y3step var-DUMMY2 (calc-graph-zval nil)
478 calc-graph-yvec calc-graph-yval calc-graph-ycache calc-graph-ycacheptr calc-graph-yvector
479 calc-graph-numsteps calc-graph-numsteps3
480 (calc-graph-keep-file (and (not calc-graph-is-splot) (file-exists-p filename)))
481 (calc-graph-stepcount 0)
482 (calc-symbolic-mode nil)
483 (calc-prefer-frac nil)
484 (calc-internal-prec (max 3 precision))
485 (calc-simplify-mode (and (not (memq calc-simplify-mode
489 (calc-graph-non-blank nil)
490 (math-working-step 0)
491 (math-working-step-2 nil))
493 (if calc-graph-is-splot
494 (calc-graph-compute-3d)
495 (calc-graph-compute-2d))
497 (goto-char (point-max))
498 (insert "\n" calc-graph-xname)
499 (if calc-graph-is-splot
500 (insert ":" calc-graph-y3name))
501 (insert ":" calc-graph-yname "\n\n")
502 (setq tempbuftop (point))
503 (let ((calc-group-digits nil)
504 (calc-leading-zeros nil)
505 (calc-number-radix 10)
506 (calc-twos-complement-mode nil)
507 (entry (and (not calc-graph-is-splot)
508 (list calc-graph-xp calc-graph-yp calc-graph-xhigh calc-graph-numsteps))))
510 (nth 1 (nth (1+ calc-graph-curve-num)
511 calc-graph-file-cache)))
512 (setq calc-graph-keep-file nil))
513 (setcar (cdr (nth (1+ calc-graph-curve-num) calc-graph-file-cache))
515 (or calc-graph-keep-file
516 (calc-graph-format-data)))
517 (or calc-graph-keep-file
519 (or calc-graph-non-blank
520 (error "No valid data points for %s:%s"
521 calc-graph-xname calc-graph-yname))
522 (write-region tempbuftop (point-max) filename
524 (insert (prin1-to-string filename))))
525 (if calc-graph-surprise-splot
526 (setcdr cache-env nil))
527 (if (= calc-graph-curve-num 0)
529 (calc-gnuplot-command "clear")
530 (calc-clear-command-flag 'clear-message)
531 (message "No data to plot!"))
532 (setq calc-graph-data-cache-limit (max calc-graph-curve-num
533 calc-graph-data-cache-limit))
534 (let ((filename (calc-temp-file-name 0)))
535 (write-region (point-min) (point-max) filename nil 'quiet)
536 (calc-gnuplot-command "load" (prin1-to-string filename)))
537 (or (equal output "STDOUT")
538 calc-gnuplot-keep-outfile
539 (progn ; need to close the output file before printing/plotting
540 (setq calc-graph-last-output "STDOUT")
541 (calc-gnuplot-command "set output")))
542 (let ((command (if printing
543 calc-gnuplot-print-command
544 (or calc-gnuplot-plot-command
545 (and (string-match "^dumb" device)
546 'calc-graph-show-dumb)
548 'calc-graph-show-tty)))))
550 (if (stringp command)
551 (calc-gnuplot-command
554 calc-gnuplot-print-output)))
555 (if (symbolp command)
556 (funcall command output)
557 (eval command))))))))))
559 (defun calc-graph-compute-2d ()
560 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
561 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
562 (error "Can't plot an empty vector")
563 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
564 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
565 (error "%s and %s have different lengths" calc-graph-xname calc-graph-yname))
566 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
567 (math-constp calc-graph-xvalue))
568 (setq calc-graph-xstep (math-div (math-sub (nth 3 calc-graph-xvalue)
569 (nth 2 calc-graph-xvalue))
570 (1- calc-graph-numsteps))
571 calc-graph-xvalue (nth 2 calc-graph-xvalue))
572 (if (math-realp calc-graph-xvalue)
573 (setq calc-graph-xstep 1)
574 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname)))))
575 (or (math-realp calc-graph-yvalue)
576 (let ((math-arglist nil))
577 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
578 (calc-default-formula-arglist calc-graph-yvalue)
580 (error "%s does not contain any unassigned variables" calc-graph-yname))
581 (and (cdr math-arglist)
582 (error "%s contains more than one variable: %s"
583 calc-graph-yname math-arglist))
584 (setq calc-graph-yvalue (math-expr-subst calc-graph-yvalue
585 (math-build-var-name (car math-arglist))
586 '(var DUMMY var-DUMMY)))))
587 (setq calc-graph-ycache (assoc calc-graph-yvalue calc-graph-data-cache))
588 (delq calc-graph-ycache calc-graph-data-cache)
589 (nconc calc-graph-data-cache
590 (list (or calc-graph-ycache (setq calc-graph-ycache (list calc-graph-yvalue)))))
591 (if (and (not (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec)))
592 calc-graph-refine (cdr (cdr calc-graph-ycache)))
593 (calc-graph-refine-2d)
594 (calc-graph-recompute-2d))))
596 (defun calc-graph-refine-2d ()
597 (setq calc-graph-keep-file nil
598 calc-graph-ycacheptr (cdr calc-graph-ycache))
599 (if (and (setq calc-graph-xval (calc-graph-find-command "xrange"))
600 (string-match "\\`\\[\\([0-9.eE+-]*\\):\\([0-9.eE+-]*\\)\\]\\'"
602 (let ((b2 (match-beginning 2))
604 (setq calc-graph-xlow (math-read-number (substring calc-graph-xval
607 calc-graph-xhigh (math-read-number (substring calc-graph-xval b2 e2))))
609 (while (and (cdr calc-graph-ycacheptr)
610 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xlow))
611 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))))
612 (setq math-working-step-2 (1- (length calc-graph-ycacheptr)))
613 (while (and (cdr calc-graph-ycacheptr)
614 (or (not calc-graph-xhigh)
615 (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xhigh)))
616 (setq var-DUMMY (math-div (math-add (car (car calc-graph-ycacheptr))
617 (car (nth 1 calc-graph-ycacheptr)))
619 math-working-step (1+ math-working-step)
620 calc-graph-yval (math-evaluate-expr calc-graph-yvalue))
621 (setcdr calc-graph-ycacheptr (cons (cons var-DUMMY calc-graph-yval)
622 (cdr calc-graph-ycacheptr)))
623 (setq calc-graph-ycacheptr (cdr (cdr calc-graph-ycacheptr))))
624 (setq calc-graph-yp calc-graph-ycache
625 calc-graph-numsteps 1000000))
627 (defun calc-graph-recompute-2d ()
628 (setq calc-graph-ycacheptr calc-graph-ycache)
630 (setq calc-graph-numsteps (1- (length calc-graph-xvalue))
631 calc-graph-yvector nil)
632 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
633 (math-constp calc-graph-xvalue))
634 (setq calc-graph-numsteps calc-graph-resolution
636 calc-graph-xlow (nth 2 calc-graph-xvalue)
637 calc-graph-xhigh (nth 3 calc-graph-xvalue)
638 calc-graph-xstep (math-div (math-sub calc-graph-xhigh calc-graph-xlow)
639 (1- calc-graph-numsteps))
640 calc-graph-xvalue (nth 2 calc-graph-xvalue))
641 (error "%s is not a suitable basis for %s"
642 calc-graph-xname calc-graph-yname)))
643 (setq math-working-step-2 calc-graph-numsteps)
644 (while (>= (setq calc-graph-numsteps (1- calc-graph-numsteps)) 0)
645 (setq math-working-step (1+ math-working-step))
648 (setq calc-graph-xp (cdr calc-graph-xp)
649 calc-graph-xval (car calc-graph-xp))
650 (and (not (eq calc-graph-ycacheptr calc-graph-ycache))
651 (consp (car calc-graph-ycacheptr))
652 (not (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xval))
653 (setq calc-graph-ycacheptr calc-graph-ycache)))
654 (if (= calc-graph-numsteps 0)
655 (setq calc-graph-xval calc-graph-xhigh) ; avoid cumulative roundoff
656 (setq calc-graph-xval calc-graph-xvalue
657 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep))))
658 (while (and (cdr calc-graph-ycacheptr)
659 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
660 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))
661 (or (and (cdr calc-graph-ycacheptr)
662 (Math-equal (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
664 (setq calc-graph-keep-file nil
665 var-DUMMY calc-graph-xval)
666 (setcdr calc-graph-ycacheptr (cons (cons calc-graph-xval (math-evaluate-expr calc-graph-yvalue))
667 (cdr calc-graph-ycacheptr)))))
668 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr))
670 (setq calc-graph-yvector (cons (cdr (car calc-graph-ycacheptr)) calc-graph-yvector))
671 (or calc-graph-yp (setq calc-graph-yp calc-graph-ycacheptr))))
673 (setq calc-graph-xp calc-graph-xvalue
675 calc-graph-yp (cons 'vec (nreverse calc-graph-yvector))
676 calc-graph-numsteps (1- (length calc-graph-xp)))
677 (setq calc-graph-numsteps 1000000)))
679 (defun calc-graph-compute-3d ()
680 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
681 (if (math-matrixp calc-graph-yvalue)
683 (setq calc-graph-numsteps (1- (length calc-graph-yvalue))
684 calc-graph-numsteps3 (1- (length (nth 1 calc-graph-yvalue))))
685 (if (eq (car-safe calc-graph-xvalue) 'vec)
686 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
687 (error "%s has wrong length" calc-graph-xname))
688 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
689 (math-constp calc-graph-xvalue))
690 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps
691 (nth 2 calc-graph-xvalue)
693 (math-sub (nth 3 calc-graph-xvalue)
694 (nth 2 calc-graph-xvalue))
695 (1- calc-graph-numsteps))))
696 (if (math-realp calc-graph-xvalue)
697 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps calc-graph-xvalue 1))
698 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))))
699 (if (eq (car-safe calc-graph-y3value) 'vec)
700 (or (= (1- (length calc-graph-y3value)) calc-graph-numsteps3)
701 (error "%s has wrong length" calc-graph-y3name))
702 (if (and (eq (car-safe calc-graph-y3value) 'intv)
703 (math-constp calc-graph-y3value))
704 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3
705 (nth 2 calc-graph-y3value)
707 (math-sub (nth 3 calc-graph-y3value)
708 (nth 2 calc-graph-y3value))
709 (1- calc-graph-numsteps3))))
710 (if (math-realp calc-graph-y3value)
711 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3 calc-graph-y3value 1))
712 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))))
713 (setq calc-graph-xp nil
717 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue) calc-graph-yvalue (cdr calc-graph-yvalue))
718 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
719 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
720 calc-graph-zp (nconc calc-graph-zp (cons '(skip)
721 (copy-sequence (cdr (car calc-graph-yvalue)))))))
722 (setq calc-graph-numsteps (1- (* calc-graph-numsteps
723 (1+ calc-graph-numsteps3)))))
724 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
725 (error "Can't plot an empty vector"))
726 (or (and (eq (car-safe calc-graph-xvalue) 'vec)
727 (= (1- (length calc-graph-xvalue)) calc-graph-numsteps))
728 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))
729 (or (and (eq (car-safe calc-graph-y3value) 'vec)
730 (= (1- (length calc-graph-y3value)) calc-graph-numsteps))
731 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))
732 (setq calc-graph-xp calc-graph-xvalue
733 calc-graph-yp calc-graph-y3value
734 calc-graph-zp calc-graph-yvalue
736 (or (math-realp calc-graph-yvalue)
737 (let ((math-arglist nil))
738 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
739 (calc-default-formula-arglist calc-graph-yvalue)
740 (setq math-arglist (sort math-arglist 'string-lessp))
741 (or (cdr math-arglist)
742 (error "%s does not contain enough unassigned variables" calc-graph-yname))
743 (and (cdr (cdr math-arglist))
744 (error "%s contains too many variables: %s" calc-graph-yname math-arglist))
745 (setq calc-graph-yvalue (math-multi-subst calc-graph-yvalue
746 (mapcar 'math-build-var-name
748 '((var DUMMY var-DUMMY)
749 (var DUMMY2 var-DUMMY2))))))
750 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
751 (setq calc-graph-numsteps (1- (length calc-graph-xvalue)))
752 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
753 (math-constp calc-graph-xvalue))
754 (setq calc-graph-numsteps calc-graph-resolution
755 calc-graph-xvalue (calcFunc-index calc-graph-numsteps
756 (nth 2 calc-graph-xvalue)
757 (math-div (math-sub (nth 3 calc-graph-xvalue)
758 (nth 2 calc-graph-xvalue))
759 (1- calc-graph-numsteps))))
760 (error "%s is not a suitable basis for %s"
761 calc-graph-xname calc-graph-yname)))
762 (if (eq (car-safe calc-graph-y3value) 'vec)
763 (setq calc-graph-numsteps3 (1- (length calc-graph-y3value)))
764 (if (and (eq (car-safe calc-graph-y3value) 'intv)
765 (math-constp calc-graph-y3value))
766 (setq calc-graph-numsteps3 calc-graph-resolution
767 calc-graph-y3value (calcFunc-index calc-graph-numsteps3
768 (nth 2 calc-graph-y3value)
769 (math-div (math-sub (nth 3 calc-graph-y3value)
770 (nth 2 calc-graph-y3value))
771 (1- calc-graph-numsteps3))))
772 (error "%s is not a suitable basis for %s"
773 calc-graph-y3name calc-graph-yname)))
774 (setq calc-graph-xp nil
778 (setq math-working-step 0)
779 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue))
780 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
781 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
782 calc-graph-zp (cons '(skip) calc-graph-zp)
783 calc-graph-y3step calc-graph-y3value
784 var-DUMMY (car calc-graph-xvalue)
785 math-working-step-2 0
786 math-working-step (1+ math-working-step))
787 (while (setq calc-graph-y3step (cdr calc-graph-y3step))
788 (setq math-working-step-2 (1+ math-working-step-2)
789 var-DUMMY2 (car calc-graph-y3step)
790 calc-graph-zp (cons (math-evaluate-expr calc-graph-yvalue) calc-graph-zp))))
791 (setq calc-graph-zp (nreverse calc-graph-zp)
792 calc-graph-numsteps (1- (* calc-graph-numsteps (1+ calc-graph-numsteps3))))))
794 (defun calc-graph-format-data ()
795 (if (math-contains-sdev-p calc-graph-yp)
796 (let ((yp calc-graph-yp))
797 (setq calc-graph-yp (cons 'vec (mapcar 'math-get-value (cdr yp))))
798 (setq calc-graph-zp (cons 'vec (mapcar 'math-get-sdev (cdr yp))))))
799 (while (<= (setq calc-graph-stepcount (1+ calc-graph-stepcount)) calc-graph-numsteps)
801 (setq calc-graph-xp (cdr calc-graph-xp)
802 calc-graph-xval (car calc-graph-xp)
803 calc-graph-yp (cdr calc-graph-yp)
804 calc-graph-yval (car calc-graph-yp)
805 calc-graph-zp (cdr calc-graph-zp)
806 calc-graph-zval (car calc-graph-zp))
808 (setq calc-graph-xval calc-graph-xvalue
809 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep)
810 calc-graph-yp (cdr calc-graph-yp)
811 calc-graph-yval (car calc-graph-yp))
812 (setq calc-graph-xval (car (car calc-graph-yp))
813 calc-graph-yval (cdr (car calc-graph-yp))
814 calc-graph-yp (cdr calc-graph-yp))
815 (if (or (not calc-graph-yp)
816 (and calc-graph-xhigh (equal calc-graph-xval calc-graph-xhigh)))
817 (setq calc-graph-numsteps 0))))
818 (if calc-graph-is-splot
819 (if (and (eq (car-safe calc-graph-zval) 'calcFunc-xyz)
820 (= (length calc-graph-zval) 4))
821 (setq calc-graph-xval (nth 1 calc-graph-zval)
822 calc-graph-yval (nth 2 calc-graph-zval)
823 calc-graph-zval (nth 3 calc-graph-zval)))
824 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xyz)
825 (= (length calc-graph-yval) 4))
827 (or calc-graph-surprise-splot
828 (with-current-buffer (get-buffer-create "*Gnuplot Temp*")
830 (goto-char (point-max))
831 (re-search-backward "^plot[ \t]")
832 (insert "set parametric\ns")
833 (setq calc-graph-surprise-splot t))))
834 (setq calc-graph-xval (nth 1 calc-graph-yval)
835 calc-graph-zval (nth 3 calc-graph-yval)
836 calc-graph-yval (nth 2 calc-graph-yval)))
837 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xy)
838 (= (length calc-graph-yval) 3))
839 (setq calc-graph-xval (nth 1 calc-graph-yval)
840 calc-graph-yval (nth 2 calc-graph-yval)))))
841 (if (and (Math-realp calc-graph-xval)
842 (Math-realp calc-graph-yval)
843 (or (not calc-graph-zval) (Math-realp calc-graph-zval)))
845 (setq calc-graph-blank nil
846 calc-graph-non-blank t)
847 (if (Math-integerp calc-graph-xval)
848 (insert (math-format-number calc-graph-xval))
849 (if (eq (car calc-graph-xval) 'frac)
850 (setq calc-graph-xval (math-float calc-graph-xval)))
851 (insert (math-format-number (nth 1 calc-graph-xval))
852 "e" (int-to-string (nth 2 calc-graph-xval))))
854 (if (Math-integerp calc-graph-yval)
855 (insert (math-format-number calc-graph-yval))
856 (if (eq (car calc-graph-yval) 'frac)
857 (setq calc-graph-yval (math-float calc-graph-yval)))
858 (insert (math-format-number (nth 1 calc-graph-yval))
859 "e" (int-to-string (nth 2 calc-graph-yval))))
863 (if (Math-integerp calc-graph-zval)
864 (insert (math-format-number calc-graph-zval))
865 (if (eq (car calc-graph-zval) 'frac)
866 (setq calc-graph-zval (math-float calc-graph-zval)))
867 (insert (math-format-number (nth 1 calc-graph-zval))
868 "e" (int-to-string (nth 2 calc-graph-zval))))))
870 (and (not (equal calc-graph-zval '(skip)))
871 (boundp 'var-PlotRejects)
872 (eq (car-safe var-PlotRejects) 'vec)
873 (nconc var-PlotRejects
877 calc-graph-xval calc-graph-yval)))
878 (calc-refresh-evaltos 'var-PlotRejects))
882 (setq calc-graph-blank t))))))
884 (defun calc-temp-file-name (num)
885 (while (<= (length calc-graph-file-cache) (1+ num))
886 (setq calc-graph-file-cache (nconc calc-graph-file-cache (list nil))))
887 (car (or (nth (1+ num) calc-graph-file-cache)
888 (setcar (nthcdr (1+ num) calc-graph-file-cache)
889 (list (make-temp-file
890 (concat calc-gnuplot-tempfile
892 (char-to-string (- ?A num))
893 (int-to-string num))))
896 (defun calc-graph-delete-temps ()
897 (while calc-graph-file-cache
898 (and (car calc-graph-file-cache)
899 (file-exists-p (car (car calc-graph-file-cache)))
901 (delete-file (car (car calc-graph-file-cache)))
903 (setq calc-graph-file-cache (cdr calc-graph-file-cache))))
905 (defun calc-graph-kill-hook ()
906 (calc-graph-delete-temps))
908 (defun calc-graph-show-tty (output)
909 "Default calc-gnuplot-plot-command for \"tty\" output mode.
910 This is useful for tek40xx and other graphics-terminal types."
911 (call-process-region 1 1 shell-file-name
912 nil calc-gnuplot-buffer nil
913 "-c" (format "cat %s >/dev/tty; rm %s" output output)))
915 (defvar calc-dumb-map nil
916 "The keymap for the \"dumb\" terminal plot.")
918 (defun calc-graph-show-dumb (&optional output)
919 "Default calc-gnuplot-plot-command for Pinard's \"dumb\" terminal type.
920 This \"dumb\" driver will be present in Gnuplot 3.0."
922 (save-window-excursion
923 (switch-to-buffer calc-gnuplot-buffer)
924 (delete-other-windows)
925 (goto-char calc-gnuplot-trail-mark)
926 (or (search-forward "\f" nil t)
928 (goto-char (point-max))
929 (re-search-backward "\f\\|^[ \t]+\\^$\\|G N U P L O T")
930 (if (looking-at "\f")
933 (if (eolp) (forward-line 1))
934 (or (calc-graph-find-command "time")
935 (calc-graph-find-command "title")
936 (calc-graph-find-command "ylabel")
938 (insert-before-markers (format "(%s)" (current-time-string)))
940 (set-window-start (selected-window) (point))
941 (goto-char (point-max)))
947 (setq calc-dumb-map (make-sparse-keymap))
948 (define-key calc-dumb-map "\n" 'scroll-up-command)
949 (define-key calc-dumb-map " " 'scroll-up-command)
950 (define-key calc-dumb-map [?\S-\ ] 'scroll-down-command)
951 (define-key calc-dumb-map "\177" 'scroll-down-command)
952 (define-key calc-dumb-map "<" 'scroll-left)
953 (define-key calc-dumb-map ">" 'scroll-right)
954 (define-key calc-dumb-map "{" 'scroll-down-command)
955 (define-key calc-dumb-map "}" 'scroll-up-command)
956 (define-key calc-dumb-map "q" 'exit-recursive-edit)
957 (define-key calc-dumb-map "\C-c\C-c" 'exit-recursive-edit)))
958 (use-local-map calc-dumb-map)
959 (setq truncate-lines t)
960 (message "Type `q' or `C-c C-c' to return to Calc")
962 (bury-buffer "*Gnuplot Trail*")))
964 (defun calc-graph-clear ()
966 (if calc-graph-last-device
967 (if (or (equal calc-graph-last-device "x11")
968 (equal calc-graph-last-device "X11"))
969 (calc-gnuplot-command "set output"
970 (if (equal calc-graph-last-output "STDOUT")
972 (prin1-to-string calc-graph-last-output)))
973 (calc-gnuplot-command "clear"))))
975 (defun calc-graph-title-x (title)
976 (interactive "sX axis title: ")
977 (calc-graph-set-command "xlabel" (if (not (equal title ""))
978 (prin1-to-string title))))
980 (defun calc-graph-title-y (title)
981 (interactive "sY axis title: ")
982 (calc-graph-set-command "ylabel" (if (not (equal title ""))
983 (prin1-to-string title))))
985 (defun calc-graph-title-z (title)
986 (interactive "sZ axis title: ")
987 (calc-graph-set-command "zlabel" (if (not (equal title ""))
988 (prin1-to-string title))))
990 (defun calc-graph-range-x (range)
991 (interactive "sX axis range: ")
992 (calc-graph-set-range "xrange" range))
994 (defun calc-graph-range-y (range)
995 (interactive "sY axis range: ")
996 (calc-graph-set-range "yrange" range))
998 (defun calc-graph-range-z (range)
999 (interactive "sZ axis range: ")
1000 (calc-graph-set-range "zrange" range))
1002 (defun calc-graph-set-range (cmd range)
1003 (if (equal range "$")
1005 (let ((val (calc-top-n 1)))
1006 (if (and (eq (car-safe val) 'intv) (math-constp val))
1008 (math-format-number (math-float (nth 2 val))) ":"
1009 (math-format-number (math-float (nth 3 val)))))
1010 (if (and (eq (car-safe val) 'vec)
1013 (math-format-number (math-float (nth 1 val))) ":"
1014 (math-format-number (math-float (nth 2 val)))))
1015 (error "Range specification must be an interval or 2-vector")))
1016 (calc-pop-stack 1))))
1017 (if (string-match "\\[.+\\]" range)
1018 (setq range (substring range 1 -1)))
1019 (if (and (not (string-match ":" range))
1020 (or (string-match "," range)
1021 (string-match " " range)))
1022 (aset range (match-beginning 0) ?\:))
1023 (calc-graph-set-command cmd (if (not (equal range ""))
1024 (concat "[" range "]"))))
1026 (defun calc-graph-log-x (flag)
1028 (calc-graph-set-log flag 0 0))
1030 (defun calc-graph-log-y (flag)
1032 (calc-graph-set-log 0 flag 0))
1034 (defun calc-graph-log-z (flag)
1036 (calc-graph-set-log 0 0 flag))
1038 (defun calc-graph-set-log (xflag yflag zflag)
1039 (let* ((old (or (calc-graph-find-command "logscale") ""))
1040 (xold (string-match "x" old))
1041 (yold (string-match "y" old))
1042 (zold (string-match "z" old))
1044 (setq str (concat (if (if xflag
1045 (if (eq xflag 0) xold
1046 (> (prefix-numeric-value xflag) 0))
1049 (if (eq yflag 0) yold
1050 (> (prefix-numeric-value yflag) 0))
1053 (if (eq zflag 0) zold
1054 (> (prefix-numeric-value zflag) 0))
1055 (not zold)) "z" "")))
1056 (calc-graph-set-command "logscale" (if (not (equal str "")) str))))
1058 (defun calc-graph-line-style (style)
1060 (calc-graph-set-styles (and style (prefix-numeric-value style)) t))
1062 (defun calc-graph-point-style (style)
1064 (calc-graph-set-styles t (and style (prefix-numeric-value style))))
1066 (defun calc-graph-set-styles (lines points &optional yerr)
1068 (with-current-buffer calc-gnuplot-input
1069 (or (calc-graph-find-plot nil nil)
1070 (error "No data points have been set!"))
1071 (let ((base (point))
1072 (mode nil) (lstyle nil) (pstyle nil)
1073 start end lenbl penbl errform)
1074 (re-search-forward "[,\n]")
1076 (setq end (point) start end)
1078 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+with\\)")
1080 (setq start (match-beginning 1))
1081 (goto-char (match-end 0))
1082 (if (looking-at "[ \t]+\\([a-z]+\\)")
1083 (setq mode (buffer-substring (match-beginning 1)
1085 (if (looking-at "[ \ta-z]+\\([0-9]+\\)")
1086 (setq lstyle (string-to-number
1087 (buffer-substring (match-beginning 1)
1089 (if (looking-at "[ \ta-z]+[0-9]+[ \t]+\\([0-9]+\\)")
1090 (setq pstyle (string-to-number
1091 (buffer-substring (match-beginning 1)
1094 (setq lenbl (or (equal mode "lines")
1095 (equal mode "linespoints"))
1096 penbl (or (equal mode "points")
1097 (equal mode "linespoints")))
1101 lenbl (>= lines 0)))
1102 (setq lenbl (not lenbl)))
1106 penbl (>= points 0)))
1107 (setq penbl (not penbl))))
1108 (delete-region start end)
1112 (math-contains-sdev-p
1116 (re-search-backward ":\\(.*\\)\\}")
1117 (match-string 1))))))
1120 (insert " with yerrorbars")
1127 (if penbl "linespoints" "lines")
1128 (if penbl "points" "dots"))))
1129 (if (and pstyle (> pstyle 0))
1131 (if (and lstyle (> lstyle 0)) (int-to-string lstyle) "1")
1132 " " (int-to-string pstyle))
1133 (if (and lstyle (> lstyle 0))
1134 (insert " " (int-to-string lstyle)))))))
1135 (calc-graph-view-commands))
1137 (defun calc-graph-zero-x (flag)
1139 (calc-graph-set-command "noxzeroaxis"
1141 (<= (prefix-numeric-value flag) 0)
1142 (not (calc-graph-find-command "noxzeroaxis")))
1145 (defun calc-graph-zero-y (flag)
1147 (calc-graph-set-command "noyzeroaxis"
1149 (<= (prefix-numeric-value flag) 0)
1150 (not (calc-graph-find-command "noyzeroaxis")))
1153 (defun calc-graph-name (name)
1154 (interactive "sTitle for current curve: ")
1156 (with-current-buffer calc-gnuplot-input
1157 (or (calc-graph-find-plot nil nil)
1158 (error "No data points have been set!"))
1159 (let ((base (point))
1162 (re-search-forward "[,\n]\\|[ \t]+with")
1163 (setq end (match-beginning 0))
1165 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+title\\)")
1167 (goto-char (match-beginning 1))
1168 (delete-region (point) end))
1170 (insert " title " (prin1-to-string name))))
1171 (calc-graph-view-commands))
1173 (defun calc-graph-hide (flag)
1176 (and (calc-graph-find-plot nil nil)
1178 (or (looking-at "{")
1179 (error "Can't hide this curve (wrong format)"))
1181 (if (looking-at "*")
1182 (if (or (null flag) (<= (prefix-numeric-value flag) 0))
1184 (if (or (null flag) (> (prefix-numeric-value flag) 0))
1187 (defun calc-graph-header (title)
1188 (interactive "sTitle for entire graph: ")
1189 (calc-graph-set-command "title" (if (not (equal title ""))
1190 (prin1-to-string title))))
1192 (defun calc-graph-border (flag)
1194 (calc-graph-set-command "noborder"
1196 (<= (prefix-numeric-value flag) 0)
1197 (not (calc-graph-find-command "noborder")))
1200 (defun calc-graph-grid (flag)
1202 (calc-graph-set-command "grid" (and (if flag
1203 (> (prefix-numeric-value flag) 0)
1204 (not (calc-graph-find-command "grid")))
1207 (defun calc-graph-key (flag)
1209 (calc-graph-set-command "key" (and (if flag
1210 (> (prefix-numeric-value flag) 0)
1211 (not (calc-graph-find-command "key")))
1214 (defun calc-graph-num-points (res flag)
1215 (interactive "sNumber of data points: \nP")
1217 (if (> (prefix-numeric-value flag) 0)
1219 (message "Default resolution is %d"
1220 calc-graph-default-resolution)
1221 (setq calc-graph-default-resolution (string-to-number res)))
1223 (message "Default 3D resolution is %d"
1224 calc-graph-default-resolution-3d)
1225 (setq calc-graph-default-resolution-3d (string-to-number res))))
1226 (calc-graph-set-command "samples" (if (not (equal res "")) res))))
1228 (defun calc-graph-device (name flag)
1229 (interactive "sDevice name: \nP")
1230 (if (equal name "?")
1232 (calc-gnuplot-command "set terminal")
1233 (calc-graph-view-trail))
1235 (if (> (prefix-numeric-value flag) 0)
1237 (message "Default GNUPLOT device is \"%s\""
1238 calc-gnuplot-default-device)
1239 (setq calc-gnuplot-default-device name))
1241 (message "GNUPLOT device for Print command is \"%s\""
1242 calc-gnuplot-print-device)
1243 (setq calc-gnuplot-print-device name)))
1244 (calc-graph-set-command "terminal" (if (not (equal name ""))
1247 (defun calc-graph-output (name flag)
1248 (interactive "FOutput file name: \np")
1249 (cond ((string-match "\\<[aA][uU][tT][oO]$" name)
1251 ((string-match "\\<[tT][tT][yY]$" name)
1253 ((string-match "\\<[sS][tT][dD][oO][uU][tT]$" name)
1254 (setq name "STDOUT"))
1255 ((equal (file-name-nondirectory name) "")
1257 (t (setq name (expand-file-name name))))
1259 (if (> (prefix-numeric-value flag) 0)
1261 (message "Default GNUPLOT output file is \"%s\""
1262 calc-gnuplot-default-output)
1263 (setq calc-gnuplot-default-output name))
1265 (message "GNUPLOT output file for Print command is \"%s\""
1266 calc-gnuplot-print-output)
1267 (setq calc-gnuplot-print-output name)))
1268 (calc-graph-set-command "output" (if (not (equal name ""))
1269 (prin1-to-string name)))))
1271 (defun calc-graph-display (name)
1272 (interactive "sX display name: ")
1274 (message "Current X display is \"%s\""
1275 (or calc-gnuplot-display "<none>"))
1276 (setq calc-gnuplot-display name)
1277 (if (calc-gnuplot-alive)
1278 (calc-gnuplot-command "exit"))))
1280 (defun calc-graph-geometry (name)
1281 (interactive "sX geometry spec (or \"default\"): ")
1283 (message "Current X geometry is \"%s\""
1284 (or calc-gnuplot-geometry "default"))
1285 (setq calc-gnuplot-geometry (and (not (equal name "default")) name))
1286 (if (calc-gnuplot-alive)
1287 (calc-gnuplot-command "exit"))))
1289 (defun calc-graph-find-command (cmd)
1291 (with-current-buffer calc-gnuplot-input
1292 (goto-char (point-min))
1293 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t]*\\(.*\\)$") nil t)
1294 (buffer-substring (match-beginning 1) (match-end 1)))))
1296 (defun calc-graph-set-command (cmd &rest args)
1298 (with-current-buffer calc-gnuplot-input
1299 (goto-char (point-min))
1300 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t\n]") nil t)
1304 (let ((end (point)))
1306 (delete-region (point) (1+ end))))
1307 (if (calc-graph-find-plot t t)
1308 (if (eq (preceding-char) ?\n)
1310 (goto-char (1- (point-max)))))
1311 (if (and args (car args))
1315 (insert "set " (mapconcat 'identity (cons cmd args) " ") "\n"))))
1316 (calc-graph-view-commands))
1318 (defun calc-graph-command (cmd)
1319 (interactive "sGNUPLOT command: ")
1322 (calc-graph-view-trail)
1323 (calc-gnuplot-command cmd)
1324 (or (string= calc-gnuplot-name "pgnuplot")
1326 (accept-process-output)
1327 (calc-graph-view-trail)))))
1329 (defun calc-graph-kill (&optional no-view)
1331 (calc-graph-delete-temps)
1332 (if (calc-gnuplot-alive)
1334 (or no-view (calc-graph-view-trail))
1335 (let ((calc-graph-no-wait t))
1336 (calc-gnuplot-command "exit"))
1338 (if (process-status calc-gnuplot-process)
1339 (delete-process calc-gnuplot-process))
1340 (setq calc-gnuplot-process nil))))
1342 (defun calc-graph-quit ()
1344 (if (get-buffer-window calc-gnuplot-input)
1345 (calc-graph-view-commands t))
1346 (if (get-buffer-window calc-gnuplot-buffer)
1347 (calc-graph-view-trail t))
1348 (calc-graph-kill t))
1350 (defun calc-graph-view-commands (&optional no-need)
1352 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1353 (calc-graph-view calc-gnuplot-input calc-gnuplot-buffer (null no-need)))
1355 (defun calc-graph-view-trail (&optional no-need)
1357 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1358 (calc-graph-view calc-gnuplot-buffer calc-gnuplot-input (null no-need)))
1360 (defun calc-graph-view (buf other-buf need)
1362 (or calc-graph-no-auto-view
1363 (if (setq win (get-buffer-window buf))
1365 (and (eq buf calc-gnuplot-buffer)
1366 (with-current-buffer buf
1367 (not (pos-visible-in-window-p (point-max) win))))
1370 (bury-buffer other-buf)
1371 (let ((curwin (selected-window)))
1373 (switch-to-buffer nil)
1374 (select-window curwin))))
1375 (if (setq win (get-buffer-window other-buf))
1376 (set-window-buffer win buf)
1377 (if (eq major-mode 'calc-mode)
1379 (not (window-full-height-p)))
1380 (display-buffer buf))
1381 (switch-to-buffer buf)))))
1382 (with-current-buffer buf
1383 (if (and (eq buf calc-gnuplot-buffer)
1384 (setq win (get-buffer-window buf))
1385 (not (pos-visible-in-window-p (point-max) win)))
1387 (goto-char (point-max))
1388 (vertical-motion (- 6 (window-height win)))
1389 (set-window-start win (point))
1390 (goto-char (point-max)))))
1391 (or calc-graph-no-auto-view (sit-for 0))))
1393 (defun calc-gnuplot-check-for-errors ()
1397 (set-buffer calc-gnuplot-buffer)
1398 (goto-char calc-gnuplot-last-error-pos))
1399 (re-search-forward "^[ \t]+\\^$" nil t)
1400 (goto-char (point-max))
1401 (setq calc-gnuplot-last-error-pos (point-max))))
1402 (calc-graph-view-trail)))
1404 (defun calc-gnuplot-command (&rest args)
1406 (let ((cmd (concat (mapconcat 'identity args " ") "\n")))
1407 (or (string= calc-gnuplot-name "pgnuplot")
1408 (accept-process-output))
1409 (with-current-buffer calc-gnuplot-buffer
1410 (calc-gnuplot-check-for-errors)
1411 (goto-char (point-max))
1412 (setq calc-gnuplot-trail-mark (point))
1413 (or (>= calc-gnuplot-version 3)
1415 (set-marker (process-mark calc-gnuplot-process) (point))
1416 (process-send-string calc-gnuplot-process cmd)
1417 (if (get-buffer-window calc-gnuplot-buffer)
1418 (calc-graph-view-trail))
1419 (or (string= calc-gnuplot-name "pgnuplot")
1420 (accept-process-output (and (not calc-graph-no-wait)
1421 calc-gnuplot-process)))
1422 (calc-gnuplot-check-for-errors)
1423 (if (get-buffer-window calc-gnuplot-buffer)
1424 (calc-graph-view-trail)))))
1426 (defun calc-graph-init-buffers ()
1427 (or (and calc-gnuplot-buffer
1428 (buffer-name calc-gnuplot-buffer))
1429 (setq calc-gnuplot-buffer (get-buffer-create "*Gnuplot Trail*")))
1430 (or (and calc-gnuplot-input
1431 (buffer-name calc-gnuplot-input))
1432 (setq calc-gnuplot-input (get-buffer-create "*Gnuplot Commands*"))))
1434 (defun calc-graph-init ()
1435 (or (calc-gnuplot-alive)
1436 (let ((process-connection-type t)
1438 (if calc-gnuplot-process
1440 (delete-process calc-gnuplot-process)
1441 (setq calc-gnuplot-process nil)))
1442 (calc-graph-init-buffers)
1443 (with-current-buffer calc-gnuplot-buffer
1444 (insert "\nStarting gnuplot...\n")
1445 (setq origin (point)))
1446 (setq calc-graph-last-device nil)
1447 (setq calc-graph-last-output nil)
1448 (if (string= calc-gnuplot-name "pgnuplot")
1449 (let ((version-str (shell-command-to-string "pgnuplot -V")))
1450 (if (string-match "gnuplot \\([0-9]+\\)\\." version-str)
1451 (setq calc-gnuplot-version (string-to-number
1452 (substring version-str
1455 (setq calc-gnuplot-version 1))))
1457 (let ((args (append (and calc-gnuplot-display
1458 (not (equal calc-gnuplot-display
1459 (getenv "DISPLAY")))
1460 (not (string= calc-gnuplot-name "pgnuplot"))
1462 calc-gnuplot-display))
1463 (and calc-gnuplot-geometry
1464 (not (string= calc-gnuplot-name "pgnuplot"))
1466 calc-gnuplot-geometry)))))
1467 (setq calc-gnuplot-process
1468 (apply 'start-process
1473 (set-process-query-on-exit-flag calc-gnuplot-process nil))
1475 (error "Sorry, can't find \"%s\" on your system"
1476 calc-gnuplot-name)))
1477 (with-current-buffer calc-gnuplot-buffer
1478 (while (and (not (string= calc-gnuplot-name "pgnuplot"))
1479 (not (save-excursion
1481 (search-forward "gnuplot> " nil t)))
1482 (memq (process-status calc-gnuplot-process) '(run stop)))
1483 (accept-process-output calc-gnuplot-process))
1484 (or (memq (process-status calc-gnuplot-process) '(run stop))
1485 (error "Unable to start GNUPLOT process"))
1486 (if (not (string= calc-gnuplot-name "pgnuplot"))
1490 "G N U P L O T.*\n.*version \\([0-9]+\\)\\." nil t))
1491 (setq calc-gnuplot-version
1492 (string-to-number (buffer-substring
1495 (setq calc-gnuplot-version 1)))
1496 (goto-char (point-max)))))
1497 (with-current-buffer calc-gnuplot-input
1498 (if (= (buffer-size) 0)
1499 (insert "# Commands for running gnuplot\n\n\n")
1500 (or calc-graph-no-auto-view
1501 (eq (char-after (1- (point-max))) ?\n)
1503 (goto-char (point-max))
1506 (provide 'calc-graph)
1508 ;;; calc-graph.el ends here