Export_fig ignores demcmap() and defaults to parula colormap for 2D plots(contourf for example)

[mahendraK96]

When exporting a 2D plot (contourf plot for example) in vector form (PDF) or as a bitmap(PNG), demcmap is completely ignored and export reverts to "parula". This does not happen with other inbuilt colormaps ("hot" for example). Issue present in R2024a release with export_fig v3.44
MWE below.

Z = peaks;
F=figure();
ax=axes(F);
contourf(ax,Z);
%colormap(ax,"hot");
demcmap(Z,10);
cb=contourcbar;
export_fig(F,'test','-png','-pdf');

[altmany]

unfortunately, I do not have access to the Mapping Toolbox, so I cannot reproduce/debug this issue...

[mahendraK96]

Getting back to this issue after a long time.
I am still not sure how demcmap() modifies the figure exactly in the above example, but I have a workaround which works.

[CMAP, CLIM] = DEMCMAP(...) option allows use of colormap() which behaves nicely with export_fig().

Modified MWE

Z = peaks;
F=figure();
ax=axes(F);
contourf(ax,Z);
C=demcmap(Z,10);   % use the colormap returned by demcmap() function
colormap(ax,C);
cb=contourcbar;
export_fig(F,'test','-png','-pdf');

@altmany maybe this issue can be closed if this workaround satisfactory. Looks like a niche scenario in any case.