How to select odd and even rows from a text file

Hi

I have a text file with a big matrix. I want to select all the even rows and export to a new text file, and then select all the odd rows to another new text file.

For example, I have a A.txt with a matrix like below

1 1 1 …

2 2 2…

3 3 3 …

4 4 4 …

…

I want to separate them into to two new text files, as shown below

B.txt

1 1 1 …

3 3 3 …

…

C.txt

2 2 2 …

4 4 4 …

…

Thank you so much.

Answer 1

[Sean de Wolski]

X = X(1:2:end,:); %keep odd rows
X = X(2:2:end,:); %keep even rows