How to read a text file into a char array

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Paolo Binetti
Paolo Binetti 2017-1-22
评论： Paolo Binetti 2017-1-22
This is probably trivial, but I have not found an easy way to convert a text file of n lines and m columns (sample attached) into a char array of the same shape. The only way that might work for me is an n-long for-loop of "fscanf", but I do not know n beforehand, and I figure there must be a simpler and faster vectorized command, which I ignore (I tried fileread and textread to no avail).

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Walter Roberson
Walter Roberson 2017-1-22
temp = regexp(fileread('sample_input.txt'), '\r?\n', 'split');
output = vertcat(temp{:});
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Walter Roberson
Walter Roberson 2017-1-22
The \r represents carriage return. I did not bother to check whether your file has those or only newlines (and it is really easy end up accidentally having a mix of files) so I made the carriage return optional which is done by adding a ? after it.
An alternative to the \r?\n for your situation would be \W+ which would mean any sequence of consecutive non-"word" characters. That would also cover the case where you had multiple columns separated by blanks that you wanted to treat the same as if each were its own line.

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