[R] Help with 2-D plot of k-mean clustering analysis

[Claudia Beleites]

Hi Meng,

>   I would like to use R to perform k-means clustering on my data which
> included 33 samples measured with ~1000 variables. I have already used
> kmeans package for this analysis, and showed that there are 4 clusters in my
> data. However, it's really difficult to plot this cluster in 2-D format
> since the "huge" number of variables. One possible way is to project the
> multidimensional space into 2-D platform, but I could not find any good way
> to do that. Any suggestions or comments will be really helpful!
For suggestions it would be extremely helpful to tell us what kind of 
variables your 1000 variables are.

Parallel coordinate plots plot values over (many) variables. Whether 
this is useful, depends very much on your variables: E.g. I have 
spectral channels, they have an intrinsic order and the values have 
physically the same meaning (and almost the same range), so the parallel 
coordinate plot comes naturally (it produces in fact the spectra).

Claudia


>
> Thanks,
>
> Meng
>
> 	[[alternative HTML version deleted]]
>
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-- 
Claudia Beleites
Spectroscopy/Imaging
Institute of Photonic Technology
Albert-Einstein-Str. 9
07745 Jena
Germany

email: claudia.beleites at ipht-jena.de
phone: +49 3641 206-133
fax:   +49 2641 206-399