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| curve fitting 3rd time lucky http://forum.alglib.net/viewtopic.php?f=2&t=576 |
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| Author: | slap [ Tue May 08, 2012 9:23 pm ] |
| Post subject: | curve fitting 3rd time lucky |
Please could someone hlep me with my last post on curve fitting? I just need some guidance or an example of how to formulate a curve fitting problem like this - I'm not even certain if the lsfit routines are the ones I should be trying to figure out how to use for the type of problem I have. in the simplest terms I can think of I have a measured curve of points x,y eg the 3 points (1,1), (2,7), (3,4) I want to fit this curve as a weighted sum of other (constant) curves. For example with the two curves below x y x y 1 0 1 1 2 3.5 2 0 3 1 3 2 the y values of the measured curve could be fit exactly by multiplying the set of y values for the first constant curve by 2 and adding 1 times the second set of y values. My question then is how to formulate this in lsfitcreate? (if that is how it should be done?) apologies if this is a really basic question but I'm not a mathamatician or a programmer - but I am eager to learn thanks in anticipation |
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