How can I set up parameters DelayTime and Loopcount when using exportgraphics for producing a gif file?

I am trying to create a gif file using exprtgraphics. When I use

exportgraphics(gcf, filename, Append = true, DelayTime = 0.4)

I get an error: "Error using exportgraphics Illegal option 'delaytime' given." The same happens if I try to set Loopcount. I couldn't find an example or explanation in the MathWorks documents. I tried the "old way"

frame = getframe(gcf);
im = frame2im(frame);
[imind,cmf] = rgb2ind(im,256);
imwrite(imind,cmf,filename,'gif','WriteMode','append', 'DelayTime',0.4);

This works but the exportgraphics command is easier to use and makes a prettier gif.

So, how can I set up the parameters in exportgraphics?

Answer 1

[Richard Quist]

@Ludmila Kuncheva - those options are not available with exportgraphics (you can find the documentation for exportgraphics here). You may wish to contact support to request an enhancement

Answer 2

[Michael Habermann]

You can use imwrite which supports both settings:

https://www.mathworks.com/help/matlab/ref/imwrite.html#d124e766126