
 
Hi,
 
you may want to look at Macdonald P (2006) Mixdist package for R
www.math.mcmaster.ca/peter/mix/mix.html
 
It also has an anova test for your model so you would know if your "possible sub-populations" are statistically significant of not. I don't know why actually this package is not posted on CRAN, though!
 
I hope this helps,
 
Monica
 
 
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Message: 50Date: Tue, 6 Nov 2007 11:40:07 +1300From: "Gareth Campbell" <gcam032@gmail.com>Subject: [R] Combining Density plotsTo: "R Help" <r-help@r-project.org>Message-ID:<f629fcb80711051440r7d86a04avdea1aab6f9bf135a@mail.gmail.com>Content-Type: text/plain Hello, What I am trying to do is: Generate a density plot of a population of data. This data has a bimodaldistribution so I've isolated a couple of possible sub-populations and Iwant to overlay these two density plots over the first to see whether theyare contributing to the bimodal population. I can do this fine with plot(density(...)) and lines(density(...)) . Butthe resulting plots seem to NOT share the same scale or something. I've hada read up on bandwidth and fiddled with this but I can't quite get them howthey should look. Needless to say that the sub-populations are smaller (n)than the overall population. Does anyone know how to scale the populations so they all plot on the samescale with the density function? Thanks very much -- Gareth CampbellPhD CandidateThe University of Auckland P +649 815 3670M +6421 256 3511E gareth.campbell@esr.cri.nzgcam032@gmail.com
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Get it now.

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