Generating Randomization from a text file

Hello,

I have a text file contains numbers like the following :

1 2 3

7 5 6

4 5 5

9 11 1

I want to redistribute the lines randomly to be for example like this:

7 5 6

9 11 1

4 5 5

1 2 3

I know about the function " randperm " but I want to use it in case I have a text file and I want to generate the randomization inside it.

Regards,

[Jan]

What is your question? Do you know how to import the data from a file to a matrix? Do you know how to shuffle the rows? Does the problem include how to write a matrix to a text file? What have you tried so far?

Answer 1

[Sai Sri Pathuri]

You can read the matrix from the text file, randomize the rows and rewrite it to the text file.

For reading a matrix from text file, you may use readmatrix function.

a=readmatrix('filename.txt'); 

To shuffle the rows, you may use the following code.

b=a(randperm(size(a,1)),:); 

To write matrix to the text file, use writematrix function.

writematrix(b,'filename.txt','Delimiter','tab');

[Mahmoud Khadijeh]

Thank you very much

[Joseph Kutteh]

Works great! Thank you as well.