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Re: 2D K-S test [message #56575 is a reply to message #56519]

Fri, 26 October 2007 10:46

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Oct 26, 9:29 am, Loren Anderson <ander...@bu.edu> wrote:

> Hi, I just spent a while working with the K-S test, but I'm confused
> as to what you are trying to do. The K-S test seems to me to be one-
> dimensional by nature. Can you clarify a bit?

This is discussed in the section of Numerical Recipes titled "Do Two-
Dimensional Distributions Differ" (Section 14.7 in my edition.)
The idea is to determine if a 2-d distribution of points is consistent
with another 2-d distribution (or a model). You are right that one
cannot directly generalize the 1-d K-S test because a cumulative
probability distribution is only defined in 1d, so one needs to define
a surrogate.

Back to the OP's question. I am not aware of any IDL
implementations of the code. (I started but never finished working
on it.) If you do code it yourself and have an old edition of NR,
check out the bug fix reported at
http://www.nr.com/forum/showthread.php?t=576

--Wayne

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		2D K-S test By: ianpaul.freeley on Thu, 25 October 2007 09:49
		Re: 2D K-S test By: ianpaul.freeley on Sat, 27 October 2007 08:11
		Re: 2D K-S test By: wlandsman on Fri, 26 October 2007 10:46

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