Date:         Fri, 9 Jan 2009 15:16:09 -0800
Reply-To:     Arthur Burke <burkea@nwrel.org>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Arthur Burke <burkea@nwrel.org>
Subject:      Re: SPSS q-q plot to compare two distributions (any 2
              distributions)
In-Reply-To:  A<2ea41cbf0901091141u28335b9bra4e68c128e44d3cb@mail.gmail.com>
Content-Type: text/plain; charset="us-ascii"

qqplot in R does what Amy wants.

Art
-------------------
Art Burke
Northwest Regional Educational Laboratory
101 SW Main St, Suite 500
Portland, OR 97204-3213

-----Original Message-----
From: Amy Klein [mailto:aklein2008@gmail.com]
Sent: Friday, January 09, 2009 11:42 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: SPSS q-q plot to compare two distributions (any 2
distributions)

I need to produce qq plots that compare two distributions - regardless
of what the distributions are.  For example, if I have 2 samples of a
measure A, and I want to compare if A's distribution in sample 1 is the
same as the distribution of A in sample 2, how can I do this by
producing a q-q plot that plots the qantiles (of A) from sample 1
against the quantiles (of A) from sample 2? (I know how to compare the
two distributions using K-S, but I need the q-q plot).  Please let me
know what syntax I can use or refer me to where I can learn it.  Thanks

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