mirror of
https://github.com/djcb/mu.git
synced 2024-06-28 07:41:04 +02:00
81 lines
2.8 KiB
Scheme
81 lines
2.8 KiB
Scheme
;;
|
|
;; Copyright (C) 2011-2013 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
|
|
;;
|
|
;; This program is free software; you can redistribute it and/or modify it
|
|
;; under the terms of the GNU General Public License as published by the
|
|
;; Free Software Foundation; either version 3, or (at your option) any
|
|
;; later version.
|
|
;;
|
|
;; This program is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
;;
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with this program; if not, write to the Free Software Foundation,
|
|
;; Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
(define-module (mu plot)
|
|
:use-module (mu)
|
|
:use-module (ice-9 popen)
|
|
:export ( mu:plot ;; alias for mu:plot-histogram
|
|
mu:plot-histogram
|
|
))
|
|
|
|
(define (export-pairs pairs)
|
|
"Write a temporary file with the list of PAIRS in table format, and
|
|
return the file name."
|
|
(let* ((datafile (tmpnam))
|
|
(output (open datafile (logior O_CREAT O_WRONLY) #O0600)))
|
|
(for-each
|
|
(lambda(pair)
|
|
(display (format #f "~a ~a\n" (car pair) (cdr pair)) output))
|
|
pairs)
|
|
(close output)
|
|
datafile))
|
|
|
|
(define (find-program-in-path prog)
|
|
"Find exutable program PROG in PATH; return the full path, or #f if
|
|
not found."
|
|
(let* ((path (parse-path (getenv "PATH")))
|
|
(progpath (search-path path prog)))
|
|
(if (not progpath)
|
|
#f
|
|
(if (access? progpath X_OK) ;; is
|
|
progpath
|
|
#f))))
|
|
|
|
(define* (mu:plot-histogram data title x-label y-label
|
|
#:optional (output "dumb") (extra-gnuplot-opts '()))
|
|
"Plot DATA with TITLE, X-LABEL and X-LABEL using the gnuplot
|
|
program. DATA is a list of cons-pairs (X . Y).
|
|
|
|
OUTPUT is a string
|
|
that determines the type of output that gnuplot produces, depending on
|
|
the system. Which options are available depends on the particulars for
|
|
the gnuplot installation, but typical examples would be \"dumb\" for
|
|
text-only display, \"wxterm\" to write to a graphical window, or
|
|
\"png\" to write a PNG-image to stdout.
|
|
|
|
EXTRA-GNUPLOT-OPTS is a list
|
|
of any additional options for gnuplot."
|
|
(if (not (find-program-in-path "gnuplot"))
|
|
(error "cannot find 'gnuplot' in path"))
|
|
(let ((datafile (export-pairs data))
|
|
(gnuplot (open-pipe "gnuplot -p" OPEN_WRITE)))
|
|
(display (string-append
|
|
"reset\n"
|
|
"set term " (or output "dumb") "\n"
|
|
"set title \"" title "\"\n"
|
|
"set xlabel \"" x-label "\"\n"
|
|
"set ylabel \"" y-label "\"\n"
|
|
"set boxwidth 0.9\n"
|
|
(string-join extra-gnuplot-opts "\n")
|
|
"plot \"" datafile "\" using 2:xticlabels(1) with boxes fs solid\n")
|
|
gnuplot)
|
|
(close-pipe gnuplot)))
|
|
|
|
;; backward compatibility
|
|
(define mu-plot mu:plot-histogram)
|