How to compare column A and B based on the column C condition?

Hello, I am a beginner at Matlab.

If I want to compare columnes A and B when column C is satisfied with the condition.

for example, in the following matrix,

in case of A(:, 3) == 1,

comparing A(:, 1) to A(:,2) is my goal. How shoud I do?

A = [1 7 0; 4 2 1;8 2 1; 2 4 1; 9 4 0]

Answer 1

[Star Strider]

Try this:

A = [1 7 0; 4 2 1;8 2 1; 2 4 1; 9 4 0];

C3 = A(:,3) == 1;                                           % Logical Vector For Rows Meeting Condition
Compare = A(C3,1) ./ A(C3,2)                                % ‘Compare’ By Division

Use any method for comparing them that you want. I chose element-wise division here to demonstrate the approach.

Experiment to get the result you want.

[Nayeon Kwon]

Thank you. I solved my problem with this hint!

[Star Strider]

As always, my pleasure!