How to select columns in a matrix whose first row data is positive?

Greetings

I have this matrix:

A=[-1 2 5 4 -4;1 2 3 4 6]

I want to extract the data according to first row. Indeed, I want to extract the columns with positive data in the first row, for example for the above matrix I am searching for a code to give me the below matrix

ans=[2 5 4;2 3 4]

Answer 1

[John D'Errico]

Easy peasy.

A=[-1 2 5 4 -4;1 2 3 4 6]

A = 2×5

-1 2 5 4 -4 1 2 3 4 6

B = A(:,A(1,:) > 0)

B = 2×3

2 5 4 2 3 4

[Misi]

Many thanks