function parameter - char

Question

Ashraf 2012-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/38158-function-parameter-char

Hi everybody,

I wrote a function that get 4 parameters (one of them char = file name, and the other is arraies) and should open a file that his name was given, and some manipulations. function call looks like this

Amplitude_lie_det(file_name,qu_num,time_arr,answer_arr)

and I got an error :

??? Undefined function or method 'Amplitude_lie_det' for input arguments of type 'char'.

I will be very glad if someone that "meet" this error before can give me an advise...

thanks, Ashraf

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Answer 1

Guo 2012-5-12

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You may check the type of your first parameter in the function,the error means you call your function with a mismatch parameter type(the first one)!

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Answer 2

Oleg Komarov 2012-5-12

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在 MATLAB Online 中打开

Check that the function is on the MATLAB path with:

which -all Amplitude_lie_det

If it says 'Amplitude_lie_det' not found, then add the path where the function is located to the MATLAB path:

addpath 'c:\yourpath'

or File > Set path > Add folder.

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Walter Roberson 2012-5-12

And make sure the routine is stored in a file named Amplitude_lie_det.m

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Answer 3

Ashraf 2012-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/38158-function-parameter-char#answer_47608

thank you very much, I checked the file and his located, and after number of attempts I found that the function name and the file.m name not identical... I changed the name of the file and it's work :-)

Now I have another question, if I have a file that contain a samplings for some signals, and its arranged in matrix (not one dimensional vector), and I want to transform this data by STFT, I found some algorithems that do the transformation, but for vector (one dim.), but not for matrix... if someone used this transformation before, it will be very useful to me...

Thanks, Ashraf

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Oleg Komarov 2012-5-12

Your initial issue is solved: if you think that my or Guo's suggestion helped you solve it, then accept one of the answers.

Then,since you're asking another question I suggest to post a new thread. You will get more attention from a wider pool of contributors and the chances to get an answer will not be tied to those that participated to this thread only.

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