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Thread Subject: gaussian mixture model (gmm)

Subject: gaussian mixture model (gmm)

From: salih tuna

Date: 7 Aug, 2007 14:37:07

Message: 1 of 2

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hi,
i am applying 2 center GMM to my dataset. before doing
this, i normalize my data. is this (normalizing data before
applying GMM) a contradiction to what i am doing? but at
the end of the day i am getting good results which i can't
explain.

thanks
salih

Subject: gaussian mixture model (gmm)

From: Gautam Vallabha

Date: 13 Aug, 2007 22:00:46

Message: 2 of 2

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"salih tuna" <salihtuna@gmail.com> wrote in message
news:f9a02j$mqp$1@fred.mathworks.com...
> i am applying 2 center GMM to my dataset. before doing
> this, i normalize my data. is this (normalizing data before
> applying GMM) a contradiction to what i am doing? but at
> the end of the day i am getting good results which i can't
> explain.

If you are normalizing your entire data set (i.e., ensuring that the mean
and variance of the entire data set are 0 and 1, respectively), then there
is be no "contradiction". The distributions or clusters in the data will be
unchanged by the normalization, so the gaussian mixture estimation will work
just as well.
--

Gautam Vallabha
The MathWorks
Email: Gautam.Vallabha@mathworks.com

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Tag	Applied By	Date/Time
gmm	free mxwmxw	1 Apr, 2008 03:56:47
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