how can transform a matrix into file .txt??

Question

Sahar abdalah 2015-5-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/217718-how-can-transform-a-matrix-into-file-txt

评论： Star Strider 2015-5-22

hello everyone, I have a matrix proba (size :10 * 5).

         proba=[0.5 0.3 0.8 0.9 0.8;
         0.50 0.36 0.58 0.58 0.98;
         0.1 0.25 0.6 0.8 0.9;
         0.5 0.3 0.8 0.9 0.8;
        0.2 0.9 0.58 0.58 0.69;
        0.58 0.14 0.1 0.2 0.3;
        0.25 0.9 0.8 0.7 0.5;
        0.58 0.69 0.25 0.1 0.1;
        0.1 0.25 0.36 0.2 0.3;
       0.5 0.3 0.8 0.9 0.8 ];

I want to transform this matrix into a text file (proba.txt) with which the index column is written and the value of the column for each line as follows :

    1 0.5 2 0.3 3 0.8 4 0.9 5 0.8
    1 0.50 2 0.36 3 0.58 4 0.58 5 0.98
                 .
                 .
                 .
    1 0.5 2 0.3 3 0.8 4 0.9 5 0.8

Please I need help, how can I do it?thanks in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2015-5-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/217718-how-can-transform-a-matrix-into-file-txt#answer_179818

在 MATLAB Online 中打开

This will do what you want:

q(:,2:2:size(proba,2)*2) = proba;                               % Create Output Matrix
q(:,1:2:size(q,2)) = repmat([1:size(proba,2)], size(q,1), 1);   % Create Output Matrix
probatxt = sprintf([repmat('% f', 1, size(q,2)) '\n'], q')      % Test
fidout = fopen('proba.txt','w');
fprintf(fidout, [repmat('% f', 1, size(q,2)) '\n'], q')
fclose(fidout)

It first creates an intermediate array ‘q’ from ‘proba’ with its elements in alternate columns, then fills the remaining columns with the numbered column indices. (The sprintf call just displays the output as it will appear in the text file, and is not necessary for the code.) It then creates the file and writes to it.