Finding polynomials from a set of coordinates

03122017, 11:31 PM
Post: #15




RE: Finding polynomials from a set of coordinates
(03122017 08:27 PM)Csaba Tizedes Wrote: 1.) Why do not teach him how he can decide which polynomial degree is sufficient to fit? Sure – why not? Go ahead! ;) (03122017 08:27 PM)Csaba Tizedes Wrote: 2.) What about your 6th degree model first derivative in t=0 and t=24? As I guess these values aren't same  so that is not a good solution. Yes, f'(0) and f'(24) being equal would be nicer. Of course calculating a periodoc function is possible as well. Here is a possible result with a period of 24 hours: temperature ~ 12 – 13/3 cos(r*t) + 1/3 cos(3r*t) – 8/sqrt(3) sin(r*t) – 1/sqrt(3) sin(2r*t) where r = 2pi/24 = pi/12 This may be a better solution, although it's not what the OP asked for. Dieter 

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