[R] plot and validation in clustering

[TEMPL Matthias]

> Hi there,
> 
>  
> 
> I use function "kmeans" and "clara" to cluster one flow 
> cytometry dataset. By using function "plot", the clusters got 
> from "clara" can be graphed, while "kmeans" not. How can I 
> get the plot of the clusters of "kmeans"?

library(cluster)
data(xclara)
a1 <- clara(xclara, 3)
a2 <- kmeans(xclara, 3)
class(a1)
class(a2)
help(partition.object)
 
You need the same components for your object as a partition.object (and
the same class).
I think this can be done, but it is a little bit of work.

> 
>  
> 
> And, I hope to compare the two methods "kmeans" and "clara", 
> or in other word, I want to validate the clustering methods. 
> Which function in R could work on the validation?  

library(fpc)
?cluster.stats

Best,
Matthias

> 
>  
> 
> Thanks a lot!
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list 
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read 
> the posting guide! http://www.R-project.org/posting-guide.html
>