Update some plot %!demos so that they run under Matlab. * datetick.m: Explicitly name 'x' axis in call to datetick. * mesh.m: Use try/catch around block checking __graphics_toolkit__ which is an Octave-only figure property. * patch.m: Call patch with X,Y,C rather than X,Y,PROP,VAL which is not supported by Matlab. * ezplot3: Use explicit call to legend, rather than ';legend;' in ezplot3 call which is Octave-only syntax. * rose.m: Add a demo that Matlab can run. Matlab won't run the second demo which uses Octave-only syntax. * copyobj.m: Don't use errorbar plot style argument which is Octave-only syntax.

--- a/scripts/plot/draw/mesh.m
+++ b/scripts/plot/draw/mesh.m
@@ -126,9 +126,12 @@
 %! ylabel 'Y-axis';
 %! zlabel 'log scale';
 %! title ({'mesh() with color proportional to Z^2', 'Z-axis is log scale'});
-%! if (strcmp (get (gcf, '__graphics_toolkit__'), 'gnuplot'))
-%!   title ({'Gnuplot: mesh color is wrong', 'This is a Gnuplot bug'});
-%! endif
+%! try
+%!   if (strcmp (get (gcf, '__graphics_toolkit__'), 'gnuplot'))
+%!     title ({'Gnuplot: mesh color is wrong', 'This is a Gnuplot bug'});
+%!   endif
+%! catch
+%! end
 
 %!demo
 %! clf;