TEXTREAD File not found error

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Zara Roddis
Zara Roddis 2018-3-11
编辑： Stephen23 2018-3-13
Hi,
I've been trying to create a loop that will read an arbitrary text file under certain circumstances, but send an error for further prompt if it is not the correct file name (and/or extension).
However, I have the loop running perfectly if the file is there and correctly inputted by the user, if not then it still runs the next bit of the loop (the thank you message) and I get this error:
Error using textread (line 165)
File not found.
Error in Assignment (line 13)
EEGData = textread(Datafile);
My script is:
Datafile=input('Please enter filename with extension: ','s');
if exist ('eegdata.txt', 'file');
disp(sprintf('Thank you, please wait a moment'));
EEGData = textread(Datafile);
else
disp(sprintf('I''m sorry, this file does not exist, try again'))
end
Thanks!

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采纳的回答

Stephen23
Stephen23 2018-3-11
if 2==exist(Datafile, 'file')
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Zara Roddis
Zara Roddis 2018-3-13
Is there a way of incorporating this into a loop so the script doesn't have to be reloaded each time the user inputs the wrong file?
Stephen23
Stephen23 2018-3-13
编辑：Stephen23 2018-3-13
Try something like this:
isf = false;
msg = 'enter filename with extension: ';
while ~isf
fnm = input(msg,'s');
isf = 2==exist(fnm,'file');
msg = 'try another filename: ';
end
disp('Thank you, please wait a moment');
EEGData = textread(fnm);
Personally I find throwing an error a better choice.

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