fopen only returns -1

Question

Anke Kügler 2016-4-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/279244-fopen-only-returns-1

回答： Anke Kügler 2016-4-16

Hi,

I'm trying to read some files (wave-files, but I also tried text) with fopen, but it always returns -1, ie. there is an error. It worked fine when selecting a .m-file. What am I forgetting? I use

fopen(uigetfile)

Edit:

It seems to have to do with the uigetfile. When I enter the path directly, it works fine. However, I don't understand, why, since I do select the specific path with uigetfile, don't I?

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Answer 1

Walter Roberson 2016-4-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/279244-fopen-only-returns-1#answer_218105

在 MATLAB Online 中打开

[filename, filepath] = uigetfile();
fullname = fullfile(filepath, filename);
fid = fopen(fullname);

Your version would only have been getting the file without its directory. When you use the single output version of uigetfile, uigetfile does not output the fully-qualified name.