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Re: Variance in sub-sections? [message #29381 is a reply to message #29379]

Mon, 18 February 2002 08:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jaco van Gorkom (j.c.van.gorkom@fz-juelich.de) writes:

> Martin Downing once posted a nifty routine IMAGE_VARIANCE to the group.
> Look up a thread called "efficient kernel or masking algorithm ? UPDATE"
> on Google.
> http://groups.google.com/groups?hl=en&q=variance+kernel& amp;meta=group%3Dcomp.la
> ng.idl-pvwave
>
> Things should then be as simple as
> variance = IMAGE_VARIANCE(image, 1, MEAN=mean) .

I just now wrote up a little synopsis of this thread,
and fixed a couple of grammatical and coding errors
in the IMAGE_VARIANCE program. Naturally, if I completely
obliterated Martin's inimitable style, I want to hear
about it. :-)

You can find it here:

http://www.dfanning.com/math_tips/variance.html

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Variance in sub-sections? By: Joshua Nipper on Mon, 18 February 2002 13:04
		Re: Variance in sub-sections? By: David Fanning on Mon, 18 February 2002 10:31
		Re: Variance in sub-sections? By: Jaco van Gorkom on Mon, 18 February 2002 10:12
		Re: Variance in sub-sections? By: David Fanning on Mon, 18 February 2002 08:42
		Re: Variance in sub-sections? By: Alex Schuster on Mon, 18 February 2002 07:41
		Re: Variance in sub-sections? By: Jaco van Gorkom on Mon, 18 February 2002 06:04

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