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Re: Conditional averaging [message #32724 is a reply to message #32723]

Wed, 06 November 2002 14:04

thompson
Messages: 584
Registered: August 1991

Senior Member

klassen@rowan.edu (David Klassen) writes:

> I have a set of arrays which I wish to average in a pixel-by-pixel fashion;
> that is, I want to create an average array. The problem is that there are
> points I wish to exclude from the averaging procedure (all of them have
> been given a particular value, say, -100).

> I think I can get them to add so that the 'bad pixel' flags don't contribute
> to the sum, however, I can't simply divide by the number of arrays, as each
> point in the array has had a different number of good pixels put into its
> sum. Is there an easy way to keep track of the number points which went
> into to the sum?

A = RANDOMN(SEED, 100, 100, 10) ;Simulated data
A(20:30,20:30) = -100
AVG = TOTAL(A,3) / TOTAL(A NE -100,3)

William Thompson

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		Re: Conditional averaging By: Craig Markwardt on Wed, 06 November 2002 15:33
		Re: Conditional averaging By: thompson on Wed, 06 November 2002 14:04

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