Conditional in values of a matrix

Hi,

I want to do the following condition in a matrix:

The example:

Any suggestion?

Thank you!

Answer 1

[KL]

indx = A(:,2)<0;
B = indx.*A(:,2) + ~indx.*(A(:,2)-A(:,3).*abs(A(:,2)))

[Montserrat Vallcorba Martí]

Thank you!

Answer 2

[Star Strider]

Your original description of the problem contains an error.

In order to get ‘Vector B’, you need to divide ‘abs(A(i,3))’ by 100.

This works, and gives the correct result:

A = [0.08 -0.335 75;  0.017 -0.335 75;  7.17 0.468 38.5;  19.33 1.379 29;  150 3.73 20];
B = A(:,2)-A(:,3).*abs(A(:,2))/100;
B(A(:,2)<0) = A(A(:,2)<0,2)

B =
   -0.3350
   -0.3350
    0.2878
    0.9791
    2.9840

[Montserrat Vallcorba Martí]

Thank you!

[Star Strider]

My pleasure!