Mercurial > octave

changeset 23961:20dd13700c08 stable

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Correct auto limits on log axes with negative and zero values (bug #51861). * graphics.cc (axes::properties::get_axis_limits): Correct auto limits on axes with logarithmic scale that span from negative values to zero.
author Markus Mützel <markus.muetzel@gmx.de>
date Sun, 27 Aug 2017 13:22:51 +0200
parents 4f4d28796934
children 882dd1c0017f 16fae04366b2
files libinterp/corefcn/graphics.cc
diffstat 1 files changed, 8 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/libinterp/corefcn/graphics.cc	Mon Aug 28 10:20:26 2017 +0200
+++ b/libinterp/corefcn/graphics.cc	Sun Aug 27 13:22:51 2017 +0200
@@ -6804,10 +6804,15 @@
               retval(1) = pow (10., retval(1));
               return retval;
             }
-          if (min_val <= 0 && max_val > 0)
+          if (min_val <= 0)
             {
-              warning ("axis: omitting non-positive data in log plot");
-              min_val = min_pos;
+              if (max_val > 0)
+                {
+                  warning ("axis: omitting non-positive data in log plot");
+                  min_val = min_pos;
+                }
+              else if (max_val == 0)
+                max_val = max_neg;
             }
           // FIXME: maybe this test should also be relative?
           if (std::abs (min_val - max_val)