Polynomial Curve Fitting Function

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farah
farah 2016-11-15
评论： Walter Roberson 2016-11-24
Hi, I have some problem regarding the polynomial curve fitting. I compute coefficient from Data A using fifth degree polynomial and the sample coefficient obtained from Data A was used back to Data B (to reconstruct similar to Data A). My question is did the polynomial considered my Data B also to fit the curve ?

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KSSV
KSSV 2016-11-15
No it will not consider data B. It gives polynomial coefficients based on Data A. If your data B x ranges are same as data A x ranges, then data B can be fitted with this polynomial.
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farah
farah 2016-11-24
so how to to compute that sine wave?
Walter Roberson
Walter Roberson 2016-11-24
x = linspace(0, 4*2*pi, 501);
x(end) = []; %4 cycles would not touch 0 a fifth time
S4 = sin(x);

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