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

4 views (last 30 days)
Adam Zabicki
Adam Zabicki on 17 Jan 2022
Edited: Adam Zabicki on 24 Jan 2022
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 Comments

Sign in to comment.

Answers (2)

Walter Roberson
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.
  1 Comment
Adam Zabicki
Adam Zabicki on 24 Jan 2022
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...

Sign in to comment.


yanqi liu
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

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by