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Re: REGRESS and sky background [message #71655 is a reply to message #71649]

Tue, 06 July 2010 07:51

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

> 1. I don't understand this line
>
> abc += [ab,c]
>
> On each iteration you are removing outliers and redoing the
> regression. But you don't want to add the newly determined
> parameters to the old ones - I think you want a simple equality in the
> above statement.

No, that's correct. It works because the image gets the background
determined at the previous iteration subtracted at each step... so the
solution to get from the original coordinates to the new plane is the
sum of the planes determined at each iteration.

-Jeremy.

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[Message index]

		Re: REGRESS and sky background By: Gray on Tue, 06 July 2010 12:50
		Re: REGRESS and sky background By: Gray on Tue, 06 July 2010 12:49
		Re: REGRESS and sky background By: Jeremy Bailin on Tue, 06 July 2010 07:51
		Re: REGRESS and sky background By: Jeremy Bailin on Tue, 06 July 2010 06:19
		Re: REGRESS and sky background By: wlandsman on Tue, 06 July 2010 06:18

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