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Matlab, how read and extract matrices

  1. May 25, 2012 #1
    Hello,
    I'm new here and in matlab, so if I do mistakes, please, tell me.
    I'm working on my thesis and I need to extract some matrices and elements, but I can't write the for-loop exactly. For example, I have to read six matrices (but then I'll have more matrices) and this is too long

    matrix_1 = dlmread('/scratch/matrix_1');
    matrix_2 = dlmread('/scratch/matrix_2');
    matrix_3 = dlmread('/scratch/matrix_3');
    ...
    ...
    and so on. I'd like to do a for loop, to read the matrices, but I don't know how. I tried with something like

    number = [1, 2, 3, 4, 5, 6];
    for ii = 1 : 6
    tmp = dlmread(sprintf('/scratch/matrix_$i', number[ii]));
    eval(sprintf('Matrix_final_$i = tmp', ii));
    end

    but it doesn't work :( In the same way, after, I have to extract the second column of each matrix, because is too long to do

    n1 = matrix_1(:,2);
    n2 = matrix_2(:,2);
    ...
    ...

    I don't understand how to use the index ii in the for loop like a string in the name of the matrices. Does somebody know if it's possible?

    Sorry for my English,
    thank you!
     
  2. jcsd
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