[R] Newbie: Measuring distance between clusters.

[Keizer_71]

It works! I was banging my head for a week. 

thank you so much.



Bill.Venables wrote:
> 
> One way to do it is to find the distances between ther "centers" (=
> centres in English) of the clusters.  
> 
> dist(kc$centers)
> 
> It rather depends on how you define distances between clusters, though.
> There are many possibilities.
> 
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> On Behalf Of Keizer_71
> Sent: Saturday, 23 February 2008 7:40 PM
> To: r-help at r-project.org
> Subject: [R] Newbie: Measuring distance between clusters.
> 
> 
> Hi,
> 
> I had 10000 genes, and I clustered them using K-means clustering in R.
> 
> kc<-kmeans(data.sub,7)
> 
> kc
> n cluster sum of squares by cluster:
> [1]  60631.76 135886.19 159049.71 101783.27  90040.72 183335.60
> 158867.81
> 
> Available components:
> [1] "cluster"  "centers"  "withinss" "size"
> 
> I am very new to R. How do i measure the distance between those cluster?
> 
> I tried
> 
> I am trying to do a complete linkage
> 
>>z<-hclust(kc,method="complete")
> 
> Error in if (n < 2) stop("must have n >= 2 objects to cluster") : 
>         argument is of length zero
> 
> thanks.
> 
>   
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> ______________________________________________
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