/usr/share/doc/libplplot12/examples/perl/x01.pl is in libplplot-dev 5.10.0+dfsg2-0.1ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 | #! /usr/bin/env perl
#
# Demo x01 for the PLplot PDL binding
#
# Simple line plot and multiple windows demo
#
# Copyright (C) 2004 Rafael Laboissiere
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PLplot 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 Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# SYNC: x01c.c 1.39
use PDL;
use PDL::Graphics::PLplot;
use Math::Trig qw [pi];
use Time::HiRes qw [usleep];
use POSIX qw [isprint];
use Getopt::Long qw [:config pass_through];
use Text::Wrap;
$Text::Wrap::columns = 72;
$xscale = 6.;
$yscale = 1.;
$xoff = 0.;
$yoff = 0.;
my $test_xor = 0;
#--------------------------------------------------------------------------
# main
#
# Generates several simple line plots. Demonstrates:
# - subwindow capability
# - setting up the window, drawing plot, and labelling
# - changing the color
# - automatic axis rescaling to exponential notation
# - placing the axes in the middle of the box
# - gridded coordinate axes
#--------------------------------------------------------------------------
sub main {
# Options data structure definition. */
my $locate_mode = 0;
my $fontset = 1;
GetOptions ("locate" => \$locate_mode,
"xor" => \$test_xor,
"font=i" => \$fontset,
"save=s" => \$f_name,
"help" => \$help);
my @notes = ("Make sure you get it right!");
if ($help) {
print (<<EOT);
$0 options:
--locate Turns on test of API locate function
--xor Turns on test of XOR
--font number Selects stroke font set (0 or 1, def:1)
--save filename Save plot in color postscript 'filename'
EOT
print (wrap ('', '', @notes), "\n");
push (@ARGV, "-h");
}
unshift (@ARGV, $0);
# plplot initialization
# Parse and process command line arguments
plParseOpts (\@ARGV, PL_PARSE_PARTIAL);
# Get version number, just for kicks */
my $ver = plgver ();
print STDOUT "PLplot library version: $ver\n";
# Initialize plplot
# Divide page into 2x2 plots unless user overrides
plstar (2, 2);
# Select font set as per input flag
plfontld ($fontset);
# Set up the data
# Original case
$xscale = 6.;
$yscale = 1.;
$xoff = 0.;
$yoff = 0.;
# Do a plot
plot1 (0);
# Set up the data
$xscale = 1.;
$yscale = 0.0014;
$yoff = 0.0185;
$digmax = 5;
plsyax ($digmax, 0);
plot1 (1);
plot2 ();
plot3 ();
#
# Show how to save a plot:
# Open a new device, make it current, copy parameters,
# and replay the plot buffer
#
if ($f_name) { # command line option '--save filename'
print (<<"EOT");
The current plot was saved in color Postscript under the name `$f_name'
EOT
my $cur_strm = plgstrm (); # get current stream
my $new_strm = plmkstrm (); # create a new one
plsfnam ($f_name); # file name
plsdev ("psc"); # device type
plcpstrm ($cur_strm, 0); # copy old stream parameters to new stream
plreplot (); # do the save by replaying the plot buffer
plend1 (); # finish the device
plsstrm ($cur_strm); # return to previous stream
}
# Let's get some user input
if ($locate_mode) {
while (1) {
my %gin = plGetCursor ();
my $k = $gin{keysym};
last if not %gin or $k == PLK_Escape;
pltext ();
printf ("subwin = $gin{subwindow}, wx = %f, wy = %f, dx = %f, "
. "dy = %f, c = "
. ($k < 0xFF and isprint (chr $k) ? "'%c'" : "0x%02x")
. "\n", $gin{wX}, $gin{wY}, $gin{dX}, $gin{dY}, $k);
plgra ();
}
}
# Don't forget to call plend() to finish off!
plend;
}
sub plot1 {
my $do_test = shift;
my $x = $xoff + $xscale * (1 + sequence (60)) / 60.0;
my $y = $yoff + $yscale * ($x ** 2);
$xmin = $x->index (0);
$xmax = $x->index (59);
$ymin = $y->index (0);
$ymax = $y->index (59);
my $idx = sequence (6) * 10 + 3;
$xs = $x->index ($idx);
$ys = $y->index ($idx);
# Set up the viewport and window using PLENV. The range in X is
# 0.0 to 6.0, and the range in Y is 0.0 to 30.0. The axes are
# scaled separately (just = 0), and we just draw a labelled
# box (axis = 0).
plcol0 (1);
plenv ($xmin, $xmax, $ymin, $ymax, 0, 0);
plcol0 (2);
pllab ("(x)", "(y)", "#frPLplot Example 1 - y=x#u2");
# Plot the data points
plcol0 (4);
plpoin ($xs, $ys, 9);
# Draw the line through the data
plcol0 (3);
plline ($x, $y);
# xor mode enable erasing a line/point/text by replotting it again
# it does not work in double buffering mode, however
if ($do_test and $test_xor) {
my $st = plxormod (1); # enter xor mode
if ($st) {
for (my $i = 0; $i < 60; $i++) {
my $xi = $x->index ($i);
my $yi = $y->index ($i);
plpoin ($xi, $yi, 9); # draw a point
usleep (50000); # wait a little
plflush (); # force an update of the tk driver
plpoin ($xi, $yi, 9); # erase point
}
plxormod (0); # leave xor mode
}
}
}
sub plot2 {
# Set up the viewport and window using PLENV. The range in X is -2.0 to
# 10.0, and the range in Y is -0.4 to 2.0. The axes are scaled separately
# (just = 0), and we draw a box with axes (axis = 1).
plcol0 (1);
plenv (-2.0, 10.0, -0.4, 1.2, 0, 1);
plcol0 (2);
pllab ("(x)", "sin(x)/x", "#frPLplot Example 1 - Sinc Function");
# Fill up the arrays
my $x = (sequence (100) - 19.0) / 6.0;
my $y = sin ($x) / $x;
$y->index (which ($x == 0)) .= 1.0;
# Draw the line
plcol0 (3);
plwidth (2);
plline ($x, $y);
plwidth (1);
}
sub plot3 {
my $space1 = 1500;
my $mark1 = 1500;
# For the final graph we wish to override the default tick intervals, and
# so do not use plenv().
pladv (0);
# Use standard viewport, and define X range from 0 to 360 degrees, Y range
# from -1.2 to 1.2.
plvsta ();
plwind (0.0, 360.0, -1.2, 1.2);
# Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y.
plcol0 (1);
plbox (60.0, 2, 0.2, 2, "bcnst", "bcnstv");
# Superimpose a dashed line grid, with 1.5 mm marks and spaces.
plstyl ($mark1, $space1);
plcol0 (2);
plbox (30.0, 0, 0.2, 0, "g", "g");
plstyl (pdl([]), pdl ([]));
plcol0 (3);
pllab ("Angle (degrees)", "sine", "#frPLplot Example 1 - Sine function");
my $x = 3.6 * sequence (101);
my $y = sin ($x * pi / 180.0);
plcol0 (4);
plline ($x, $y);
}
main ();
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