fgetl Error in Script

Hello,

I am encountering the following error:

"Error using fgetl (line 44)
Invalid file identifier.  Use fopen to generate a valid file identifier."

I receive this error when running the following function:

[SL edited to remove the fgetl.m file shipped with MATLAB. Please don't post the code of MathWorks functions. If you want to refer to a function, it's probably sufficient to mention something like "the fgetl function in MATLAB" especially if you mention which release of MATLAB you're using.]

I'm still very novice at MATLAB programming, and am using this function in a larger script to process EEG data. For a full example of the script, please see: https://github.com/wp-erp/wp-erp/issues/692

Any assistance with this is greatly appreciated. Thanks!

Answer 1

[Walter Roberson]

You have to fopen() a file first. After you fopen() you should test if the value returned by fopen is negative: if it is then the fopen failed and you should advise the user and not continue. Then once you know the fopen worked, pass the value returned by fopen to fgetl.

[Richard Ward]

Thank you, I have solved this. It was a simple file naming error.

[野犬]

hello,I meet same question，so what's wrong with my data?

[Walter Roberson]

[fid, msg] = fopen(FILENAME, 'r');
if fid < 0; error('failed to open file "%s" because "%s"', FILENAME, msg); end