I want my function to return -1 when the file doesn't open.
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I want my function to return -1 when the file doesn't open. But this happens
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Voss
2022-4-2
Your code is explicitly throwing the error, here:
error('error opening file %s\n',fname);
You can remove that line (and the next one because there is no need to close a file that's not open), so that that part looks like this:
if fid < 0
charnum = -1;
return
end
Then the function will return -1 in that case.
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Riccardo Scorretti
2022-4-2
编辑:Riccardo Scorretti
2022-4-2
Hi. You must return just after assigning the value -1 to charnum. If you call the function error... well, you get an error message and the program stops. Use warning instead.
if fid == -1
charnum = -1;
warning('error opening file %s', fname);
return
end
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