How to remove certain elements in a matrix according to the value of elements in an array

Hi all,

I want to manipulate a matrix according to the values in the first column. I want to remove rows which their values on the first column is less than 5. Here is an example

Original:

5 6

2 1

4 2

7 9

9 5

New matrix:

5 6

7 9

9 5

Answer 1

[Voss]

A = [
    5    6
    2    1
    4    2
    7    9
    9    5
    ]

A = 5×2

5 6 2 1 4 2 7 9 9 5

idx = A(:,1) < 5;
A(idx,:) = []

A = 3×2

5 6 7 9 9 5