How to extract specific data from the data files?

Hello,

CL = [ 0.572526 0.601916 0.631107 ];

CD = [ 0.024868 0.025337 0.025902 ];

How to output the value of CD when CL is 0.6?

I want to use linear interpolation but I don't know how to do.

Thakns for reading.

[Ameer Hamza]

What model does the data follow? Linear? Polynomial? Or is there some other nonlinear relation between CL and CD?

[hj lee]

Both are okay! thanks for comment!

Answer 1

[KSSV]

iwant = interp1(CL,CD,0.6)

This is the procedure:

CL  =   [ 0.572526  0.601916  0.631107 ];
CD = [ 0.024868  0.025337 0.025902 ];

xi = 0.6 ; 
yi = interp1(CL,CD,xi) ; 

plot(CL,CD)
hold on
plot(xi,yi,'*r')

[hj lee]

That's perfect answer thanks!