Function:s2wedge
From S2PLOT
(Difference between revisions)
Revision as of 01:57, 28 October 2007
s2wedge
Draw a colour wedge.
Prototype
void s2wedge(char *title, float fx1, float fx2, float fy1, float fy2, float dmin, float dmax, int annocolidx);
Description
Draw a colour wedge, using the most recently used section of the colour map (as set with s2scir), and associate the smallest colour index with the data value dmin, and the largest colour index with the data value dmax. The wedge will be drawn to cover the fractional surface of the entire window (fx1, fy1) -> (fx2, fy2). Labelling of the wedge is done in the colour given by annocolidx. It is advisable to keep title short, eg. just use it to include the units on the wedge.
See Also
| s2scir | Set the range of colour indices used for shading. |
PGPLOT Equivalent
Code Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
int i; /* Loop variable */
int N = 100; /* Number of points */
float x[100], y[100], z[100]; /* Coordinates of points */
int symbol = 1; /* Point symbol */
int col1, col2; /* Colour index range */
srand48((long)time(NULL)); /* Seed random numbers */
for (i=0;i<N;i++) {
x[i] = drand48()*2.0 - 1.0;
y[i] = drand48()*2.0 - 1.0;
z[i] = drand48()*2.0 - 1.0;
}
s2opend("/?",argc, argv); /* Open the display */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
s2slw(5); /* Sets size of point */
s2qcir(&col1, &col2); /* Query the colour range */
col1 = col2;
col2 = col2 + N;
s2scir(col1, col2); /* Set the colour index range */
s2icm("mgreen", col1, col2); /* Install a colour map */
for (i=0;i<N;i++) {
s2sci(col1+i); /* Set the colour */
s2pt1(x[i],y[i],z[i],symbol); /* Draw a single point */
}
s2wedge("Range", 0.1, 0.15, 0.1, 0.4, -1.0, 1.0, S2_PG_YELLOW);
/* Draw the data wedge */
s2show(1); /* Open the s2plot window */
return 1;
}
Back to S2PLOT function list.
