comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » SVDFIT error

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

SVDFIT error [message #93216]

Fri, 13 May 2016 23:42

amin farhang
Messages: 39
Registered: November 2010

Member

Dear All,

I'm trying to fit a function to some data with SVDFIT function.
But unfortunately although the A vector is defined, program return % Variable is undefined: A.
What is happening?

CODE:

FUNCTION fnc, X ,M
RETURN,[ [X^A[1]], [A[0]*A[1]*X^(A[1]-1.0)] ]
END

t = [13.05, 13.15, 13.2500, 13.3500, 13.4500, $
13.5500, 13.6500, 13.7500, 13.85, 13.95, 14.05, $
14.15, 14.25, 14.35, 14.45, 14.55]
t = 10^t

r = [3.61683, 3.64082, 3.63685, 3.64338, 3.61213, $
3.64366, 3.61047, 3.51532, 3.51648, 3.48258, $
3.48976, 3.48247, 3.44729, 3.21, 3.52913, 3.28420]

yr = [0.0466166, 0.0641466, 0.103431, 0.127357, $
0.177178, 0.221442, 0.277869, 0.405861, 0.439394, $
0.519617, 0.801912, 0.792799, 0.57920, 0.13516, $
0.13516, 0.43342]

A = [3.,1.]
result = SVDFIT(t,r,A=A,MEASURE_ERRORS=yr,$
FUNCTION_NAME='fnc', SIGMA=SIGMA, YFIT=YFIT)

Best regards,

Report message to a moderator

[Message index]

		SVDFIT error By: amin farhang on Fri, 13 May 2016 23:42
		Re: SVDFIT error By: wlandsman on Sat, 14 May 2016 11:56

Previous Topic:	SPAWN result
Next Topic:	plot data

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Apr 26 05:19:53 PDT 2026

Total time taken to generate the page: 1.03415 seconds