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/plot3.m
+++ b/scripts/plot/draw/plot3.m
@@ -377,12 +377,14 @@
 %!demo
 %! clf;
 %! z = [0:0.05:5];
-%! plot3 (cos (2*pi*z), sin (2*pi*z), z, ';helix;');
+%! plot3 (cos (2*pi*z), sin (2*pi*z), z)
+%! legend ('helix');
 %! title ('plot3() of a helix');
 
 %!demo
 %! clf;
 %! z = [0:0.05:5];
-%! plot3 (z, exp (2i*pi*z), ';complex sinusoid;');
+%! plot3 (z, exp (2i*pi*z));
+%! legend ('complex sinusoid');
 %! title ('plot3() with complex input');