extract dataset from textfile to many variables

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Win co 2013-6-9

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Hi everyone, I have a textfile with N rows of data (N is very big, 45e6 for example). I would like to divide these N rows into k subsets of 1e6 rows (I suppose k is integer to simplify the problem), then save each subset to one file .mat. Could somebody show me how to code please ? Best regards, Winn

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Walter Roberson 2013-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/78507-extract-dataset-from-textfile-to-many-variables#answer_88222

If you are using OS-X or Linux, I suggest you use the Unix-level command "split"

On MS Windows, if efficiency is important, I suggest you use perl (which is included with all MATLAB releases.) The perl code can be seen at http://www.perlmonks.org/?node_id=90768

To do it in MATLAB, I would probably suggest doing the reading using textscan() with a format of '%s' and 'Delimiter', ''