Problem by saveas plot

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CSCh
CSCh 2020-12-20
回答： Image Analyst 2021-1-5
Hi everyone, I do not understand what I'am doing woring in saving my plot.
My code:
Temp=[num2str(vaiable), 'Myplotnumber' ,num2str(n) ,'-dpng'];
saveas(gcf,Temp);
it save the figure always with Var1Myplotnumber2.png.fig
why put matlab .fig at the end?
Thank you?
  3 个评论
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CSCh
CSCh 2020-12-20
If I use print(gca, Temp)
I got:
Error using alternatePrintPath
Invalid or unsupported printer '' specified.
Error in print (line 83)
pj = alternatePrintPath(pj);
Ive J
Ive J 2020-12-20
Pass gcf and not axes
print(gcf, 'test', '-dpng', '-r400')

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采纳的回答

CSCh
CSCh 2021-1-4
Thank you all so much for your help. In my case the '-dpng' ending did not work.
if I change to:
Temp=['%MyName%' ,'.png'];
saveas(gcf, Temp)
it saves png format.
BR

更多回答（3 个）

Image Analyst
Image Analyst 2020-12-20
Use exportgraphics() instead if you have R2020a or later.
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CSCh
CSCh 2020-12-21
Yes that works for me, but why does not my code work? Maybe something with my loop (num2str (n)), I have to check..
Image Analyst
Image Analyst 2020-12-21
I don't know. You never showed me your exportgraphics() code that didn't work. You only showed it where it worked in the command window with a hard-coded filename string. Please post the non-working code from your m-file. Apparently it thinks your Temp did not have an extension on it. Are you sure Temp ends in '.png'?

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Walter Roberson
Walter Roberson 2020-12-21
Temp = {sprintf('%dMyplotnumber%d.png', vaiable, n),'-dpng'};
saveas(gcf, Temp{:})
Image Analyst
Image Analyst 2021-1-5
You can do
baseFileName = sprintf('%d Myplotnumber %d.png', variable, n); % Name without folder.
fullFileName = fullfile(yourFolder, baseFileName); % Prepend folder.
saveas(gcf, fullFileName);

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