Climb Performance Problem Help

Hi, I was planning to make code to plot climb rate against velocity. I have the values for thrust at a given values, both of these are 1x9 vectors. The assumptions I made that while it is climbing L = Wcostheta and that the angle of attack therefore stays constant throughout. My problem is that I am unable to find the drag, the C_D (3D) is a 1x41 vector and I don't know how these values correlate. Correlate in the sense I have these coefficient of drag values but with respect to what? Do I make an assumption?

is there a way to plot irrespective of the dimensions?

[John D'Errico]

You need to talk to the person who assigned this problem to you. You are not asking questions about MATLAB anyway.