How to create a file .txt from a matrix?

Hello everyone, I have a matrix x_training (size: 1000*2304) and another matrix y_training (size 1000*1) that contains labels of each instance in x_training. My goal is to create a file .txt that contain labels and x_training. there is a little example for simplification :

 x_training=[0.2 0.3
             0.5 0.4
             0.5 0.9]
 y_training=[1
             2
             3]

so, the file.txt will contain :

   1  0.2 0.3
   2  0.5 0.4
   3  0.5 0.9

Please, help me, How can I do it? and thanks in advance

Answer 1

[Rime]

I think Adam's answer is right. What you need more is a loop:

 fid = fopen( 'somefile.txt', 'w' );

 for n=1:1000

   fprintf( fid, '%d ', y_training(n));

   for m=1:2304

     fprintf( fid, '%.1f ', x_training(n,m));

   end

   fprintf(fid,'\n');

 end

 fclose(fid);

Let me know, if it doesn't work.

Answer 2

[Adam]

fid = fopen( 'somefile.txt', 'w' );
fprintf( fid, '%d %.1f %.1f\n', [y_training x_training ]');

would give what you want. You can change the format specifications to suit what you prefer.

[aya ben mabrouk]

it works for the little example, but as I said in the question, I work with matrix with size 1000*2304 et 1000*1. it dosen't work in this case. what is the problem?

[Adam]

I don't know. What is the problem? I don't have an example matrix of the size you say to test with, but you have obviously tried it so you know better than me what the problem is.

Answer 3

[Muhammad Usman Saleem]

Hi, I hope you are fine

You can create a matrix data of which the first column is of y_training and 2:end ,columns are x_training?

Please try and tell me if not working

    data=[y_training x_training(:,1:2304)] %based on your matrix
    fId = fopen( 'your file.txt', 'w' ) ;
     fprintf( fId, '%i %2.1f %2.1f \r\n', data(:) ) ; % update this line
     fclose( fId ) ;

As i have not your matrixes that why here is the demo of testing this code

a=rand(1000,2304); % creating randomly 1000*2304 matrix as x_training
b=rand(1000,1); % creating randomly 1000*1 matrix as y_training
c=[b a(:,1:end)];
data=c;
fId = fopen( 'your file.txt', 'w' ) ;
 fprintf( fId, '%i %2.1f %2.1f \r\n', data(:) ) ;
 fclose( fId ) ;

sample output text file i obtain

8.985058e-01 0.1 0.3 
9.572001e-01 1.0 0.6 
7.864674e-01 0.6 0.4 
8.036594e-01 1.0 0.6 
7.004861e-01 0.3 0.8 
2.858565e-01 0.5 0.9 
1.721007e-02 0.9 0.9 
8.984719e-01 0.9 0.3 
3.485380e-01 1.0 1.0 
3.902574e-02 0.8 0.4 
6.243073e-01 0.8 0.8 
1.473974e-01 0.2 0.2 
8.838331e-01 0.9 0.5 
8.072159e-01 0.4 0.4 
1.996930e-01 0.2 0.3 
5.608404e-01 0.6 0.3 
3.858926e-02 0.0 0.2 
9.515419e-01 0.9 0.0 
7.501847e-01 0.5 0.4 
3.773373e-01 0.1 0.3 
6.825213e-01 0.6 0.5 
2.274023e-01 0.2 0.3 
2.509858e-01 0.4 1.0 
2.334426e-01 0.3 0.6 
9.447222e-01 0.9 0.7 
8.488192e-01 0.2 0.7 
3.411729e-01 0.5 0.7 
3.744066e-01 0.8 0.3 
6.405010e-01 0.4 0.8 
7.717461e-01 0.1 0.9 
6.768452e-01 0.8 0.8 
3.722052e-01 0.3 0.9 
1.738441e-01 0.5 0.8 
9.710438e-01 0.3 0.3 
3.967397e-01 0.6 0.5 
2.772546e-01 0.4 0.5 
9.171816e-01 0.4 0.8 
3.136884e-01 0.6 0.8 
5.080256e-01 0.0 0.4

[Muhammad Usman Saleem]

try this also

data=[y_training x_training(:,1:2304)] %based on your matrix
dlmwrite('myFile.txt', data);

Text file size is very long that why can not attached with this comment. Tell me which method is giving you correct output?