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| curve fitting http://forum.alglib.net/viewtopic.php?f=2&t=626 |
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| Author: | slap [ Thu Oct 11, 2012 8:30 pm ] |
| Post subject: | curve fitting |
Does anyone have any examples of curve fitting I can study? The sort of problem I have is a measured curve consisting of a weighted sum of portions of other curves A, B. C,..... I want to fit curves A, B, C,.... to the measured curve... to determine the proportions of A, B, C, ... nneded to model it. I am completely stuck as how to formulate this, should I be using the lsfit routines? if so can sopmeone give a pointer as how to set up a problem of this type many thanks in anticipation of some pointers, |
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| Author: | Sergey.Bochkanov [ Fri Oct 12, 2012 5:44 am ] |
| Post subject: | Re: curve fitting |
You should use linear least squares - this algorithm represents data as linear combination of arbitrary functions (even nonlinear) assuming that you know function values in points of dataset. lsfitlinear function, I think, should work for you. |
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