How to extract specific data from the data files?

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hj lee 2020-10-5

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评论： hj lee 2020-10-5

采纳的回答： KSSV

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.

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Ameer Hamza 2020-10-5

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

hj lee 2020-10-5

Both are okay! thanks for comment!

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KSSV 2020-10-5

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编辑：KSSV 2020-10-5

在 MATLAB Online 中打开

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')

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hj lee 2020-10-5

That's perfect answer thanks!

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