exportgraphics streches images whily saving if 'visible' is 'off' - bug?

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Adam Zabicki
Adam Zabicki 2022 年 1 月 17 日
編集済み: Adam Zabicki 2022 年 1 月 24 日
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.
  2 件のコメント
Adam Zabicki
Adam Zabicki 2022 年 1 月 24 日
no, the 'drawnow' command does not change the output PDF.

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回答 (2 件)

Walter Roberson
Walter Roberson 2022 年 1 月 23 日
Figure layout including axes layout (including xlim and ylim) is not performed until the figure visibility is turned on.
  1 件のコメント
Adam Zabicki
Adam Zabicki 2022 年 1 月 24 日
Hi,
thanks for your reply. May i have to add, that if you define the 'ContentType' to 'vector', both PDFs saved are identical. So it is the 'image' case only when the figure layout is not performed? Seems odd to me...

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yanqi liu
yanqi liu 2022 年 1 月 24 日
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 件のコメント
Adam Zabicki
Adam Zabicki 2022 年 1 月 24 日
But it works if 'ContentType' is set to 'vector'...

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