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Re: MPFIT2DFUN- use for a time series of images? [message #75506 is a reply to message #75500]

Thu, 10 March 2011 12:27

Gray
Messages: 253
Registered: February 2010

Senior Member

On Mar 10, 3:01 pm, Katie <kmwhite21...@gmail.com> wrote:
> I want to fit pixel values to a logistic model that each have X, Y
> coordinates and a day of the year value associated with them. I see
> from the MPFIT2DFUN documentation how to define X, Y for a each Z
> dependent value and the dependent error value, but can a third
> variable (day of the year in this case) be defined in order to fit a
> curve in MPFIT2DFUN? I currently have each each date as a separate
> band in a stacked image file that I exported as an ASCII file. I want
> to determine the day of the year that the pixel values (vegetation
> indices) reach a value on the the curve.
>
> Any suggestions, or perhaps I am not understanding the MPFIT2DFUN
> correctly (I am very new to IDL)?

Well, you're trying to fit 3d data with a 2d function. I would look
at mpfitfun or just mpfit.

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[Message index]

		Re: MPFIT2DFUN- use for a time series of images? By: Allard de Wit on Mon, 14 March 2011 06:46
		Re: MPFIT2DFUN- use for a time series of images? By: Katie[1] on Fri, 11 March 2011 06:47
		Re: MPFIT2DFUN- use for a time series of images? By: Allard de Wit on Fri, 11 March 2011 04:49
		Re: MPFIT2DFUN- use for a time series of images? By: Gray on Thu, 10 March 2011 12:27
		Re: MPFIT2DFUN- use for a time series of images? By: sawaid.abbas on Thu, 20 February 2014 20:23

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