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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* plotprog.c
*
* plotprog rootout outputtype
*
* rootout: root name of generated gnuplot data and cmd files
* outputtype: one of {PNG, PS, EPS, X11}
*
* This is an example program that uses the gplot library
* calls to make plots programmatically using gnuplot.
* To use it for your application, you must choose a setting
* of PLOT_STYLE, change the function that generates the
* data, and recompile.
*
* To use data from a file as input, the plotfile program
* implements a subset of gnuplot and has a simple, single
* file as input.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "allheaders.h"
/* for PLOT_STYLE, use one of the following set:
{GPLOT_LINES, GPLOT_POINTS, GPLOT_LINESPOINTS, GPLOT_DOTS,
GPLOT_IMPULSE} */
#define PLOT_STYLE GPLOT_LINES
main(int argc,
char **argv)
{
char *rootout, *outputtype;
l_int32 outtype, i;
l_float32 x, y1, y2, pi;
GPLOT *gplot;
NUMA *nax, *nay1, *nay2;
static char mainName[] = "plotprog";
if (argc != 3)
exit(ERROR_INT(" Syntax: plotprog rootout outputtype",
mainName, 1));
rootout = argv[1];
outputtype = argv[2];
/* convert input strings in set {PNG, PS, EPS, X11}
* to internal integer flags used by gplot */
outtype = UNDEF;
for (i = 0; i < NUM_GPLOT_OUTPUTS; i++) {
if (strcmp(outputtype, gplotfileoutputs[i]) == 0) {
outtype = i;
break;
}
}
if (outtype == UNDEF) { /* default to PNG */
fprintf(stderr,
"outputtype not in set {PNG, PS, EPS, X11}; using PNG\n");
outtype = GPLOT_PNG;
}
/* define data here and store in numas */
nax = numaCreate(0);
nay1 = numaCreate(0);
nay2 = numaCreate(0);
pi = 3.1415926535;
for (i = 0; i < 180; i++) {
x = (pi / 180.) * i;
y1 = (l_float32)sin(2.4 * x);
y2 = (l_float32)cos(2.4 * x);
numaAddNumber(nax, x);
numaAddNumber(nay1, y1);
numaAddNumber(nay2, y2);
}
/* plot it */
gplot = gplotCreate(nax, nay1, rootout, outtype, PLOT_STYLE,
"Example plots", "sin (2.4 * theta)",
"theta", "f(theta)");
gplotAddPlot(gplot, nax, nay2, PLOT_STYLE, "cos (2.4 * theta)");
gplotMakeOutput(gplot);
numaDestroy(&nax);
numaDestroy(&nay1);
numaDestroy(&nay2);
gplotDestroy(&gplot);
exit(0);
}
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