division of cfit objects

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Hsinho Huang
Hsinho Huang 2019-6-16
回答： Hsinho Huang 2019-6-16
Hi,
I am writing to ask how to do division of two cfit type objects.
From data (x1,y1) and (x2,y2), I obtained two fit curves f1 and f2. Then, I calculated the first derivative D of the curve f2 at each data points of x2. Finally, I wanted to calcuate the P by using D./f1. However, I got this error message : Undefined function 'rdivide' for input arguments of type 'cfit'.
Could you please let me know how I could code the calculation of P correctly?
f1=fit(x1,y1,'smoothingspline','Normalize','on')
f2=fit(x2,y2,'smoothingspline','Normalize','on')
D=differentiate(f2,x2)
P=D./f1

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采纳的回答

Walter Roberson
Walter Roberson 2019-6-16
P = D./f1(x2);

更多回答（1 个）

Hsinho Huang
Hsinho Huang 2019-6-16
Thanks! I could obtain the P values.

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