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Asked by Miguelcm90
on 3 Sep 2013

Hi everybody, First of all , I would like to thank in advance the help.

I have a problem, the first one it is that I am bennigner in matlab and I do not know probably If my explanation is good.

I have the following file:

https://www.dropbox.com/s/1wav4fb1afqx8ix/validx.txt

I know how to open, and manage with it. what I would like to know is as you see, there are 4 columms, each columm has 3 groups of values from min to max I want to make some loop to crop the matrix and divide in 3 diferent matrix that have only one group from min to max, for example,

1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3

and obtain 3 diferent matrix like below:

1 1 2 2 3 3

the purpose of using a loop is because the file size changes in rows and columns.

Any help is deeply valuable for me.

Heartfelt thanks,

Miguel

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Answer by Andrei Bobrov
on 3 Sep 2013

Edited by Andrei Bobrov
on 3 Sep 2013

m = dlmread('pathtovalidx.txt'); idx = cumsum([true;diff(m(:,1)) < 0]); a = unique(histc(idx,1:idx(end))); if numel(a) == 1 out = reshape(m,a,size(m,2),[]); else out = mat2cell(m,a,size(m,2)); end

here `out` is three dimension double array or cell array, where each page or cell with your new matrix

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