Plotting (and saving) a figure with a black background

2013 9 9
2 个回答
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更新时间：2022 1 26
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0 个投票

Hi again,
I have another plotting question; I have 4 subplots and I want one of them to have a black background. Since I only want one to have the black background I can't use colordef.
I have tried:
set(subplot(vertical,horizontal,figure_name),'Color','k')
and:
set(gca,'color','black')
These both work to colour the subplot in the figure window but when I save the figure (as a .png) the saved subplot has a white background. I have also tried plotting a massive black patch that covers the plot area - but this also gets missed or overwritten when saving the figure!
If there are any other commands/ways to change the background colour I would love to know them.
As always any help is greatly appreciated.
Rod.

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Image Analyst
Image Analyst 2013-12-2

1 个投票

You accepted the wrong answer. There is a way to do it. this works just fine:
subplot(2,2,1);
subplot(2,2,2);
subplot(2,2,3);
subplot(2,2,4);
set(gca,'color','black')
export_fig('yourfigure.png');
export_fig() is available here: http://www.mathworks.com/matlabcentral/fileexchange/ It's the most downloaded File Exchange submission ever, for a reason.

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Right Grievous
Right Grievous 2013-12-2
You are right Image Analyst, this does work with export-fig - at least with a simple plot function. My original use was with patches and bar which I guess this will also work with. The funny thing is I was using export-fig when I was trying to get a black background... I'm not sure why it wasn't working.
I left the question up for a long time and got no answers so I was just trying to tidy things up a bit. Thank you for the help!
Krystian
Krystian 2022-1-26
set(gca,'color','k') works as long you don't use axis off :(

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James Heagy
James Heagy 2022-1-7

0 个投票

While export_fig will do the job, I find that the default settings are not always ideal. If you wanted a plot with white dots on a black background you can simply do this:
h=figure(1);
plot(x,y,'w.');
set(gca,'color',[0 0 0])
set(h,'InvertHardcopy','off')
print(h,figfname,'-dtiffn');
I use -dtiffn to get a super high-res plot, then I generally open the file in Preview (on the Mac - not sure what to use on other platforms) and export the plot as a jpg.
The result from export_fig(figfname,'-tif'), by comparison, is unacceptable for publication, IMHO.

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