Add titles and clean-up plotting %!demos. * scripts/plot/area.m, scripts/plot/axis.m, scripts/plot/bar.m, scripts/plot/barh.m, scripts/plot/clabel.m, scripts/plot/colorbar.m, scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/contour.m, scripts/plot/contour3.m, scripts/plot/contourf.m, scripts/plot/cylinder.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/ezplot.m, scripts/plot/ezplot3.m, scripts/plot/ezpolar.m, scripts/plot/feather.m, scripts/plot/fplot.m, scripts/plot/hold.m, scripts/plot/isosurface.m, scripts/plot/legend.m, scripts/plot/loglog.m, scripts/plot/loglogerr.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/patch.m, scripts/plot/pcolor.m, scripts/plot/pie.m, scripts/plot/pie3.m, scripts/plot/plot.m, scripts/plot/plot3.m, scripts/plot/polar.m, scripts/plot/rectangle.m, scripts/plot/ribbon.m, scripts/plot/rose.m, scripts/plot/scatter.m, scripts/plot/scatter3.m, scripts/plot/semilogx.m, scripts/plot/semilogxerr.m, scripts/plot/semilogy.m, scripts/plot/semilogyerr.m, scripts/plot/sombrero.m, scripts/plot/stem3.m, scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfl.m, scripts/plot/title.m, scripts/plot/waterfall.m: Add titles and clean-up plotting %!demos.

--- a/scripts/plot/mesh.m
+++ b/scripts/plot/mesh.m
@@ -92,10 +92,21 @@
 %! clf;
 %! x = logspace (0,1,11);
 %! z = x'*x;
+%! mesh (x, x, z);
+%! xlabel 'X-axis';
+%! ylabel 'Y-axis';
+%! zlabel 'Z-axis';
+%! title ('mesh() with color proportional to height');
+
+%!demo
+%! clf;
+%! x = logspace (0,1,11);
+%! z = x'*x;
 %! mesh (x, x, z, z.^2);
 %! xlabel 'X-axis';
 %! ylabel 'Y-axis';
 %! zlabel 'linear scale';
+%! title ('mesh() with color proportional to Z^2');
 
 %!demo
 %! clf;
@@ -106,6 +117,7 @@
 %! xlabel 'X-axis';
 %! 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