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histogram2 images not properly saved in vector format
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z8080
am 10 Mai 2022
Kommentiert: z8080
am 17 Mai 2022
I used this code to generate a 2D histogram:
h(i) = histogram2(pairs(:,1), pairs(:,2), -12:12, -12:12, 'DisplayStyle','tile', 'ShowEmptyBins','on', 'EdgeColor', 0.15*[1 1 1], 'LineWidth', .01);
and then saved the image in a vector format:
print('-dmeta', 'plot.emf' )
However, when zooming into this image, it looks pixelated. Saving the image as EMF (or for that matter SVG) from the Matlab figure window leads to the same problem.
Other plots, created with normal plotting commands such as plot and scatter, save just fine as vector images, but with histogram2, it appears not. Why is that?
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Benjamin Kraus
am 16 Mai 2022
Bearbeitet: Benjamin Kraus
am 16 Mai 2022
I was able to get a vector export using exportgraphics and forcing it to export in vector mode:
histogram2(randn(1000,1), randn(1000,1), ...
'DisplayStyle','tile', 'ShowEmptyBins','on', ...
'EdgeColor', 0.15*[1 1 1], 'LineWidth', .01);
exportgraphics(gcf,'out.pdf','ContentType','vector');
I was also able to get a PDF in vector mode from print:
histogram2(randn(1000,1), randn(1000,1), ...
'DisplayStyle','tile', 'ShowEmptyBins','on', ...
'EdgeColor', 0.15*[1 1 1], 'LineWidth', .01);
print -dpdf -vector plot.pdf
I'm not sure exactly what is causing MATLAB to default to 'image' format. I couldn't find anything obviously wrong that would trigger that mode, although I believe that happens when MATLAB determines through a heuristic that the vector export time could be very large.
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