# HG changeset patch
# User Rik <rik@octave.org>
# Date 1685491492 25200
# Node ID 10daf5ce7f28f23f4783d4fee1773d127fce65f2
# Parent  d039fbf922971f1fe558ca58d19092c017d04b57
Set "tight" axes limits by default for pcolor() plot (bug #64244)

* NEWS.9.md: Announce change in Matlab Compatibility section.

* pcolor.m: Set axes properties "[xyz]limitmethod" to "tight" so that
plot just encompasses the given data.

diff -r d039fbf92297 -r 10daf5ce7f28 etc/NEWS.9.md
--- a/etc/NEWS.9.md	Mon May 22 16:22:42 2023 -0700
+++ b/etc/NEWS.9.md	Tue May 30 17:04:52 2023 -0700
@@ -93,6 +93,9 @@
 of the generalized eigenvalues has been removed (one can use the `ordqz`
 function for that purpose).
 
+- `pcolor` now sets the axes limits to be just large enough to display the
+plotted data (equivalent of `axis tight`).
+
 ### Alphabetical list of new functions added in Octave 9
 
 * `isuniform`
diff -r d039fbf92297 -r 10daf5ce7f28 scripts/plot/draw/pcolor.m
--- a/scripts/plot/draw/pcolor.m	Mon May 22 16:22:42 2023 -0700
+++ b/scripts/plot/draw/pcolor.m	Tue May 30 17:04:52 2023 -0700
@@ -91,44 +91,9 @@
     set (htmp, "facecolor", "flat");
     if (! ishold ())
       set (hax, "view", [0, 90], "box", "on");
-      ## FIXME: Maybe this should be in the general axis limit setting routine?
-      ##        When values are integers (such as from meshgrid), we want to
-      ##        use tight limits for pcolor, mesh, surf, etc.  Situation is
-      ##        complicated immensely by vector or matrix input and meshgrid()
-      ##        or ndgrid() format.
-      meshgrid_fmt = true;
-      if (isvector (x))
-        xrng = x(isfinite (x));
-      else
-        xrng = x(1, isfinite (x(1,:)));    # meshgrid format (default)
-        if (all (xrng == xrng(1)))
-          xrng = x(isfinite (x(:,1)), 1);  # ndgrid format
-          meshgrid_fmt = false;
-        endif
-      endif
-      if (isvector (y))
-        yrng = y(isfinite (y));
-      else
-        if (meshgrid_fmt)
-          yrng = y(isfinite (y(:,1)), 1);
-        else
-          yrng = y(1, isfinite (y(1,:)));
-        endif
-      endif
-      if (all (xrng == fix (xrng)))
-        xmin = min (xrng);
-        xmax = max (xrng);
-        if (xmin < xmax)
-          xlim ([xmin, xmax]);
-        endif
-      endif
-      if (all (yrng == fix (yrng)))
-        ymin = min (yrng);
-        ymax = max (yrng);
-        if (ymin < ymax)
-          ylim ([ymin, ymax]);
-        endif
-      endif
+      set (hax, "xlimmode", "auto", "ylimmode", "auto", "zlimmode", "auto",
+                "xlimitmethod", "tight", "ylimitmethod", "tight",
+                "zlimitmethod", "tight");
     endif
 
   unwind_protect_cleanup