How can I export figure as png?

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Tomas
Tomas 2014-10-7
编辑： Walter Roberson 2025-7-9
I have the script which creates 3D figure. The only way to save it is
hgsave(graph, [input, output, '\', string{i + 8}, '.png'],'-v7.3');
I tried different ways to save it as png and all failed. It stores only axis.
print(graph,'-dpng',[input,output,'\',string{i +8},'.png']);
saveas(graph, [input, output, '\', string{i + 8}], 'png');
hgexport(graph, [input, output, '\', string{i + 8}, '.png'], hgexport('factorystyle'), 'Format', 'png');

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Wouter
Wouter 2014-10-7
Best option is to use the export_fig function from the file exchange. It actually works out of the box and intuitively (not like the annoying builtin saveas function)
http://www.mathworks.com/matlabcentral/fileexchange/23629-export-fig
  2 个评论
Shaukat
Shaukat 2023-10-22
编辑：Walter Roberson 2025-7-9
i have some issues to save figure .it shows some errors as below
I have some problem in my installed Matlab. can you send me any proper person link to guide me for this issue. When i am going to save my figures, its show some errors, even i have installed Mapping toolbox.
Below , i attached error shows my Matlab,
Warning: Probably because you do not have Mapping Toolbox, getar was performed by an approximative method.
> In getar (line 24)
In setar_ll (line 14)
In run_inversion_3flt_pso (line 154)
Error using printopt
Too many input arguments.
Error in matlab.graphics.internal.mlprintjob

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更多回答（4 个）

Julia
Julia 2014-10-7
编辑：Julia 2014-10-7
Hi,
I create a figure and save it with the follwoing command:
saveas(gcf,'picture.png')
Perhaps
saveas(gcf, [input, output, '\', string{i + 8}], 'png');
works.
  1 个评论
Tomas
Tomas 2014-10-7
All I tried didn't work. Even if I select Save as from figure menu it still save only the axis.

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Toshia M
Toshia M 2025-7-9
Ran in:
Starting in R2020a, you can use the exportgraphics function to export the contents of a figure as one of several file types, including a PNG file. This code plots a surface and exports the plot as a PNG file.
% Plot a surface
surf(peaks);
% Get the current figure
fig = gcf;
% Export the figure as a PNG
exportgraphics(fig,"mysurface.png")
exportgraphics supports both image and vector graphics file formats. If you export the figure as an image, MATLAB uses a resolution of 150 dpi. To export the figure so that it’s the same size and resolution as it appears in MATLAB, get the ScreenPixelsPerInch value from the graphics root object, and use that value to specify the resolution of the file.
sppi = get(groot,"ScreenPixelsPerInch");
exportgraphics(fig,"mysurface.png",Resolution=sppi)
●
exportgraphics has several options for configuring the output file. For example, you can choose from several file formats, create multi-page PDF files with embedded fonts as well as animated GIF files.
In R2025a, options were added to support SVG files, custom width and height values, and the ability to control the amount of padding (white space) around the graphic.
To compare exportgraphics to other methods of exporting figures, see Compare Ways to Export Graphics from Figures.
Image Analyst
Image Analyst 2014-10-7
Michael Haderlein
Michael Haderlein 2014-10-7
编辑：Michael Haderlein 2014-10-7
Did you try another renderer? I can't really explain a lot about it, but I think I once had a similar problem (though everything was black in my case) and choosing another renderer has fixed the case.
In case neither this nor the other suggestions work: I feel a bit embarrassed to mention it here, but once I was desperate enough to simply make a screenshot and save this. In case none of the solutions here works, this will for sure.

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