MATLAB: Load specific columns of a variable and sabe

Question

I define variable

B = magic(10);

If I want to save the first column of B in a differnt variable, I can do this

firstColB = B(:,1);

But what if I want to save columns 1, 3 ,5 7, 9. How can i save those specifc columns to a variable A

A = B(:,?)

Thanks!

Answer 1

Try this:

A = B(:,1:2:9)

or this:

A = B(:,[1 3 5 7 9])