draw contour plot without number labels?
Wei-Chih Liu
I am try to use Scilab to draw contour plots of some complex
patterns. However, there are always number (or captions) with contour
lines to label the values of contour lines. When the pattern is complex,
these number labels are so close and I can't make use of them.
How could I get rid of these number labels?
Thanks!
Sincerely,
Wei-Chih Liu
Lydia van Dijk
<Pine.LNX.3.96URPAS-R.99...@alfalfa.pas.rochester.edu>,
Currently, I don't see a possibility to switch off the labeling of the
contour-lines from within the interpreter. Maybe, one of the true
Scilab gurus knows...
Following the call to contour(), I reached the function
ContourTrace(double Cont, integer style)
in file $SCI/routines/graphics/Contour.c. It is responsible for the
plotting of the level-labels. If you definitely want to use Scilab
for your output, and do not want to spawn an external like PlotMTV or
GnuPlot, you can apply the following patch to your Scilab-2.4.1:
--- routines/graphics/Contour.c 1999/05/16 16:20:03 1.1
+++ routines/graphics/Contour.c 1999/05/16 16:48:14
@@ -907,15 +907,18 @@
integer style;
{
char *F;
+ const integer mod = 100; /* inserted by lvd, Sun May 16 16:30:59 UTC
1999 */
+ integer s2 = style % mod;
integer verbose=0 ,Dnarg,Dvalue[10];
integer close=0, flag=0;
double angle=0.0;
char str[100];
C2F(dr)("xget","dashes",&verbose,Dvalue,&Dnarg,PI0,PI0,PI0,PD0,PD0,PD0,PD0,0L,0L);
/* Just the lines **/
-
C2F(dr)("xset","dashes",&style,PI0,PI0,PI0,PI0,PI0,PD0,PD0,PD0,PD0,0L,0L);
+
C2F(dr)("xset","dashes",&s2,PI0,PI0,PI0,PI0,PI0,PD0,PD0,PD0,PD0,0L,0L);
C2F(dr)("xlines","void",&cont_size,xcont,ycont,&close,PI0,PI0,PD0,PD0,PD0,PD0,0L,0L);
C2F(dr)("xset","dashes",Dvalue,PI0,PI0,PI0,PI0,PI0,PD0,PD0,PD0,PD0,0L,0L);
+ if (abs(style) > mod) return;
F=getFPF();
if ( F[0] == '\0')
sprintf(str,ContNumFormat,ContNumPrec,Cont);
Admittedly, it is nothing but a dirty hack, but it allows you to stick
with Scilab. Now, if the magnitude of the plot-style is larger than
100, then the plotting of the contour-labels is switched off. I have
tested the patch only briefly. It does not seem to have a major
advert effect on the workings of the f?contour(2d)?-functions. So, to
summarize, we have the following behavior:
style result
======== ========
1: 99 colored contour lines with labels
-1: -99 black contour lines with labels
100: ... colored contour lines without labels
-100: ... black contour lines without labels
Hope this helps! Of course, this problem should be solved in
a cleaner way in a future Scilab version.
Lydia van Dijk
PS: I'm not a guru :)
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---Share what you know. Learn what you don't.---
Enrico Segre
xset("fpf"," ")
note the second string is " " and not "". Maybe dr. Scilab would better
put it into the faq...
