Mercurial > octave

changeset 24408:a9be96afb39e stable

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Set gnuplot color data to half output range when autoscaling zero input range (bug #52624). * __gnuplot_draw_axes__.m: Ensure cbrange is not zero when cmap_sz is 1 by using 2 instead to avoid gnuplot error. (mapcdata): When the clim range is zero, set cdata to half range in both the TrueColor and colormap cases using the proper truncation of fraction.
author Daniel J Sebald <daniel.sebald@ieee.org>
date Tue, 12 Dec 2017 22:10:59 -0600
parents 5528840346e7
children ca0ebd1d0da1 6e1d3ad32ed1
files scripts/plot/util/private/__gnuplot_draw_axes__.m
diffstat 1 files changed, 3 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/scripts/plot/util/private/__gnuplot_draw_axes__.m	Wed Dec 13 08:33:09 2017 -0800
+++ b/scripts/plot/util/private/__gnuplot_draw_axes__.m	Tue Dec 12 22:10:59 2017 -0600
@@ -1471,7 +1471,7 @@
       fprintf (plot_stream, "set cbrange [1:%.15e];\n",
                cmap_sz + rows (addedcmap));
     else
-      fprintf (plot_stream, "set cbrange [1:%.15e];\n", cmap_sz);
+      fprintf (plot_stream, "set cbrange [1:%.15e];\n", max ([cmap_sz 2]));
     endif
   endif
 
@@ -2878,7 +2878,7 @@
       cdata = 255 * (cdata - clim(1)) / clim_rng;
       cdata(cdata < 0) = 0;  cdata(cdata > 255) = 255;
     else
-      cdata(:) = 255;
+      cdata(:) = fix (255 / 2);
     endif
   else
     if (islogical (cdata))
@@ -2890,7 +2890,7 @@
       if (clim_rng != 0)
         cdata = 1 + fix (cmap_sz * (cdata - clim(1)) / clim_rng);
       else
-        cdata(:) = cmap_sz;
+        cdata(:) = 1 + fix (cmap_sz / 2);
       endif
     else
       if (isinteger (cdata))