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Re: How to do least sqares with IDL? [message #32466 is a reply to message #32370]

Mon, 07 October 2002 07:23

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Weimin Wang wrote:
>
> Dear Sir,
>
> Is there any linear least sqares pro and minimizing absolute deviation
> pro in IDL?I search it in Reference manual,But get nothing.

Go into the online manual, select Index, then type in "least squares".
You'll find four different routines listed. The first two are for
non-linear least squares fitting, the third is specifically for
polynomial fitting, but the fourth (SVD_FIT) is intended for general use
linear least-squares fitting.

I couldn't find anything for minimizing the absolute deviation. I'm not
familiar with any algorithms for doing that. Do you have any references
describing how it can be done?

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[Message index]

		How to do least sqares with IDL? By: Weimin Wang on Mon, 07 October 2002 01:25
		Re: How to do least sqares with IDL? By: Weimin Wang on Mon, 07 October 2002 08:09
		Re: How to do least sqares with IDL? By: James Kuyper on Mon, 07 October 2002 07:23

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