How to chose the initial values for the coefficeints in nlinfit
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How to chose the initial values for the coefficients in nonlinear fit:
say I am tying to fit using
a=nlinfit(x,y,'modelfun',a)
with a is the initial values for the coefficients
say I have define vector a as a=[0.1 1 1 1 0.1]
how to assign these initial values and what are these matrix elements (0.1,1,1,1,0.1) indicates.?
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Robert Cumming
2014년 7월 22일
The values of "a" known as beta in the functions help are the initial values that the model will use as parameters in your 'modelfun'.
The values are 100% dependent on your model - you can start with zeros, ones or values which are "likely" to be near the end result - it can effect the solution so think about it carefully in advance.
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