Shouldn't fprintf(s) work for any string s?

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Alec Nagel 2013-10-14

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评论： Jan 2013-10-14

Hi,

I have a structure array that I want to write to a file. I initially used evalc to do this, but found that Rody Oldenhuis's toString function gave a more informative string. It turns out, however, that I am not able to write the resulting string to a file (or to stdout) with fprintf. The following:

s = toString(myStruct);
fprintf(s)

returns gibberish, even though s is a character array as it should be. I thought fprintf worked for all strings. What am I missing?

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Jan 2013-10-14

@Alec: Please show us an example of what "gibberish" means.

Alec Nagel 2013-10-14

@David: I am using the Matlab Central one. The builtin tostring function from the DSP toolbox seems to be made for a more specific task.

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Answer 1

Jan 2013-10-14

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https://ww2.mathworks.cn/matlabcentral/answers/90140-shouldn-t-fprintf-s-work-for-any-string-s#answer_99572

编辑：Jan 2013-10-14

在 MATLAB Online 中打开

fprintf works for strings, but interprets escape characters. Compare:

fprintf('hello, this is a \n backslash');
fprintf('%s', 'hello, this is a \n backslash');

Similar problems occur for %. So better use the '%s' format specifier to display strings.

[EDITED after your comment] I assume "multi-line-string" means a CHAR matrix. A short example would have revealed this immediately. Then:

CStr = cellstr(Str);
fprintf('%s\n', CStr{:});

Please care for adding a helpful example to reduce the time we waste with guessing.

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Alec Nagel 2013-10-14

[After your edit.] Sorry about that, Jan, I'll make sure I include an example next time.

And thanks for your help! I am very impressed with your work in here.

Jan 2013-10-14

Thanks, Alec. There is no need to say sorry, because you are the one who suffers most from a delayed solution. It is the nature of a question, that it is not clear in the beginning, which information is important and which is not.

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