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Re: MPFIT and initial Guesses [message #87991 is a reply to message #87988]

Mon, 10 March 2014 14:13

Phillip Bitzer
Messages: 223
Registered: June 2006

Senior Member

You can change the default step size by using the appropriate tags in the parinfo array of structures:

; .STEP - the step size to be used in calculating the numerical
; derivatives. If set to zero, then the step size is
; computed automatically. Ignored when AUTODERIVATIVE=0.
; This value is superceded by the RELSTEP value.
;
; .RELSTEP - the *relative* step size to be used in calculating
; the numerical derivatives. This number is the
; fractional size of the step, compared to the
; parameter value. This value supercedes the STEP
; setting. If the parameter is zero, then a default
; step size is chosen.

What are you using now for parinfo?

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[Message index]

		MPFIT and initial Guesses By: steve.kaeppler on Mon, 10 March 2014 09:32
		Re: MPFIT and initial Guesses By: wlandsman on Mon, 10 March 2014 10:01
		Re: MPFIT and initial Guesses By: steve.kaeppler on Mon, 10 March 2014 10:51
		Re: MPFIT and initial Guesses By: Phillip Bitzer on Mon, 10 March 2014 14:13
		Re: MPFIT and initial Guesses By: steve.kaeppler on Mon, 10 March 2014 20:01
		Re: MPFIT and initial Guesses By: Craig Markwardt on Mon, 10 March 2014 22:11

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