how to reject whole columns based on a condition

A = [5 10 18 13

-2 8 -9 10

40 47 85 -30]

condiotion : remove columns with any negative numbers

result=[10

8

47]

kindly note that this is in a for loop

Answer 1

[Akira Agata]

No need to use for-loop. Please try the following:

A = [5    10    18     13;
  -2     8    -9       10;
  40   47   85     -30];

idx = any(A<0);

result = A(:,~idx);