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Re: Plane fit [message #39189 is a reply to message #39149]

Tue, 27 April 2004 14:18

Steve.Morris
Messages: 17
Registered: November 2002

Junior Member

Hi!
Thanks both, the function plane_fit is really straightforward and work
excellent!

I have tried to get more confident with the powerfull mpfit package,
but I'm still stuck at the first step :(

Here is what I do (where x,y,z have the following format array[n] and
I have no errors for my data ... gedankexperiment ;) !)

FitParms = MPFIT2DFUN('Plane2DFunction',$
x ,y, z,$
start_params=[0.D,0.D,0.D],$
/WEIGHTS, /Quiet)

where the fitting function is defined as follows

FUNCTION Plane2DFunction, x, y, P
Return, P[0] + P[1]*x + P[2]*y
END

If I use the keyword Quiet, and query(help,FitParms) about FitParms,
idl reply me
FITPARMS DOUBLE = NaN

If I drop the keyword Quiet, I have the following message
MPFIT2DFUN: ERROR: must pass parameters in P or PARINFO
and FitParms is still NaN ...

Where do I wrong? Probably I'm doing something really stupid
Thanks!Cheers,
S.

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[Message index]

		Re: Plane fit By: MKatz843 on Thu, 22 April 2004 22:43
		Re: Plane fit By: Dick Jackson on Tue, 20 April 2004 08:55
		Re: Plane fit By: Steve.Morris on Tue, 27 April 2004 14:18

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