Classification Analysis

----- Original Message -----
From: <ozric at web.de>
To: "Rishabh Gupta" <rg117 at ohm.york.ac.uk>
Cc: <r-help at hypatia.math.ethz.ch>
Sent: Wednesday, April 17, 2002 3:54 PM
Subject: Re: [R] Classification Analysis


really interesting!
is there some url/docs for more information or are this your own
thoughts - maybe for Ph.D thesis ?


Am 17.04.2002 15:22:08, schrieb "Rishabh Gupta" <rg117 at ohm.york.ac.uk>:

Thanks For your reply
I would really prefer to use R as I am using R for all the other

exploratory analysis that I am doing on the data

In my humble opinion in R the package(Rpart) is good starting point
for this, but in fact you get no really rules. The result are more
sub-segmentation's which habit different with the classification (dependent)
variable. But you can formulate rules on the basis of the results in a
sophisticated way..........

regards,christian




Thanks!
It is for a PhD, but to this point I am still trying prove/disprove so there
is not documentation. That's why I need to get to grips with the statistical
analysis system.

P.S.
One question - i make electronic music with ComputerSoftware,too
and i'm statistican - what are the 750 variables and what is your
classification criterium ? (if it is not a secret !)
regards,christian

I have a large of variables (750) because I have a lot of version of each
kind of data. I analyse melody, rhythm, harmony, etc as a different stream
of data. For each one, I calculate a different versions, intervals,

contour,

modulo, modulo of interval, etc. For each one of those I perform a

different

kind of analysis, basic statistics, complexity measurements, etc. For each
kind of analysis there are five results each. E.g. for statistical, there

is

mean, SD, MAD, COV, etc.
After performing all these different conversions/analysis I end up with
about 750 variables (6 * 5 * 5 * 5)
The classification groups are different depending on what set of MIDI files
I am analysing. In some sets the criteria is genre, subject (who played the
piece), composer, extract (which piece of music), etc.

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