Have you made normal probability plots? Mixtures of a small
number of normal distributions will appear as a collection of straight
line segments with breakpoints related to the mixing percentages, slopes
of the lines proportional to the standard deviations, etc. I don't
understand the math behind this, but some simple simulations will expose
the patterns. See, e.g., McLachlan and Basford (1988) Mixture Models
(Marcel Dekker).
hope this helps. spencer graves
Unung Istopo Hartanto wrote:
Yes, I need normal mixtures plotting, because i found my data not normal
and closer to bimodal.
Thanks for All, I've installed package "nor1mix". And its solve my
problem.
regards,
Unung
On Thu, 2004-06-24 at 16:04, Martin Maechler wrote:
"Unung" == Unung Istopo Hartanto <[EMAIL PROTECTED]>
on Thu, 24 Jun 2004 10:49:29 +0700 writes:
Unung> Hi R Users, Sorry if its out of topic. I would like
Unung> to ask you about twin peaks - normal
Unung> distribution. How R can handle it, any example to
Unung> explain it in R.
It's not off-topic but you didn't really say what you want
(read the posting guide as indicated in the last line of this message!)
so I guess "Twin Peaks - Normal" means a mixture of two normal
distributions.
There's the small
package 'nor1mix' for univariate normal mixtures plotting, RNG
etc, and the much more extensive package
'mclust' which allows to *estimate* multivariate (now including
uni-variate) normal mixture model parameters.
Is it what you've wanted?
Martin Maechler
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