exportgraphics streches images whily saving if 'visible' is 'off' - bug?
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Hello,
I stumbled upon what might be a bug, or I am just overseeing some features...
When you run this code, the two saved PDFs should be the same because they only differ in their "visible" value. But if the figure's visibility is 'off', the saved PDF is distorted: The white space at the bottom is missing, and the content is streched to the bottom end.
Is this a bug?
clear all; close all;
%% on
f1 = figure('Visible','on');
heatmap(rand(10,5))
exportgraphics(f1,'test_on.pdf','ContentType','image');
%% off
f2 = figure('Visible','off');
heatmap(rand(10,5))
exportgraphics(f2,'test_off.pdf','ContentType','image');
edit: what is odd is, that this behavior is only seen when 'ContentType' is 'image'. Saving 'vector' graphics everything is ok.
3 Comments
Trama Robin
on 4 Nov 2022
I had the same issue.
In my code I have an if loop that is adding a patch on my figure only for some conditions, and the size was changing.
Adding a drawnow with an else statement and add an invisible patch even if I didn't need prevented the issue.
FYI, I am exporting in .tif, so it's an image and not a vector.
Answers (3)
Walter Roberson
on 23 Jan 2022
Figure layout including axes layout (including xlim and ylim) is not performed until the figure visibility is turned on.
yanqi liu
on 24 Jan 2022
clear all; close all;
data = rand(10,5);
%% on
f1 = figure('Visible','on');
h1=heatmap(data);
exportgraphics(f1,'test_on.pdf','ContentType','image');
fa1 = getframe(f1);
%% off
f2 = figure('Visible','off');
h2=heatmap(data);
exportgraphics(f2,'test_off.pdf','ContentType','image');
fa2 = getframe(f2);
%% compare
figure;
subplot(1,2,1); imshow(frame2im(fa1));
subplot(1,2,2); imshow(frame2im(fa2));
yes,sir,now we can see the image is same,but export pdf when visible off is different,may be the axis do not set to equal in the code
3 Comments
yanqi liu
on 24 Jan 2022
yes,sir,may be figure display can make the image x、y axis equal,if not display,then the x、y axis not equal,so when get pdf print,it is mismatch
aamir ibrahim
on 2 Aug 2023
One workaround is to set the 'WindowState' for the figure to 'minimized'.
fig = figure;
fig.WindowState = 'minimized';
fig.Visible = 'on';
% Use exportgraphics
exportgraphics(fig);
close(fig);
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