Dynamic file name with saveas() function

2012 6 26
1 个回答
3 次查看（30 天）

0 个投票

Hi,
I am using matlab into a labview program and I need to save figures. I have a variable which contain the name I want to use to save the file but I can't use this variable into the function:
fileName = strcat(numberOfBeams, 'RPM vs Volt');
saveas(gcf, [dirfig, fileName, 'png']);
The code gives an error... But it works if don't use the variable
saveas(gcf, [dirfig, 'RPM vs Volt TEST', 'png']);
Thanks a lot for your help !

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Walter Roberson
Walter Roberson 2012-6-26
What does class(numberOfBeams) and size(numberOfBeams) and class(fileName) indicate ?
What is the error message?
My speculation is that the strcat() is producing a cell array.
Jean
Jean 2012-6-26
I can't use my program in Matlab directly because it needs my labview variables. But numberOfBeams is a String. So I guess fileName is a String too...
Walter Roberson
Walter Roberson 2012-6-26
What error message is being produced?

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回答（1 个）

Image Analyst
Image Analyst 2012-6-27

1 个投票

Try this:
folder = dirfig;
baseFileName = sprintf('%d RPM vs Volt.png', numberOfBeams);
fullFileName = fullfile(folder, baseFileName);
saveas(gcf, fullFileName);
% Or even better:
export_fig(fullFileName);
% http://blogs.mathworks.com/pick/2010/05/28/creating-and-exporting-publication-quality-graphics/

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Jean
Jean
2012-6-26

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