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2D-fit [message #38286]

Tue, 02 March 2004 04:21

Esa Riihonen
Messages: 6
Registered: July 2003

Junior Member

Hi all!

I seek advice on fitting a following function with 2-free variables mu and
phi (Below '.' indicates multiplication and '^2' power of 2 ):

F(mu,phi) = a0 + a1.mu + a2.mu^2 + (a3.mu + a4.mu^2).cos(phi-phi0),

phi0 is a constant and ai are the fitting parameters.

Measurement set consists of 240 values (10 values for mu and 24 for phi,
this in effect a polar coordinate grid with 24 'sectors' and 10 'rings').

So the question what is the best way of doing this in IDL?

I would be grateful for any advice,

Esa

--
Esa Riihonen - esa@riihonen.st.net (Remove spam trap = '.st')

The CT Creed: "There is no Game but Traveller,
and High Guard is its Product" Steve Hudson

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