Error using fopen

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med-sweng 2014-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/152282-error-using-fopen

评论： Star Strider 2014-8-27

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Hi,

I'm using the following command in a for-loop:

imwrite(x,strcat('L_',num2str(c),'_m.bmp'),'bmp');

And, getting the following error:

Error using fopen
File name must be a vector of type char.
Error in imwrite (line 453)
fid = fopen(filename, 'a');
Error in fuzzycmeans (line 83)
imwrite(x,strcat('L_',num2str(c),'_m.bmp'),'bmp');

Why is that? How can I fix this issue?

Thanks.

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回答（1 个）

Star Strider 2014-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/152282-error-using-fopen#answer_149782

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As a troubleshooting step, run this line:

flnm = strcat('L_',num2str(c),'_m.bmp')

just before your imwrite call and see what the result is.

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med-sweng 2014-8-27

Thanks for your reply. Sorry, still the same issue.

Star Strider 2014-8-27

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What does ‘flnm’ produce? Is it ‘a vector of type char’?

If you do:

cn = class(flnm)

what is the result?

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