[R] cluster, mona error

[Sean Davis]

On Jan 27, 2005, at 9:06 AM, Morten Mattingsdal wrote:

> Hi
>
> I have a problem using the package cluster on my binary data. I want 
> to try mona at first. But i get the an error.
>
> hc<-read.table("all.txt", header=TRUE, sep="\t", row.names=1)
> srt(hc)
> `data.frame':   51 obs. of  59 variables:
> $ G1p : int  2 1 1 1 1 1 1 1 1 1 ...
> $ G1q : int  1 1 1 1 1 1 1 1 1 1 ...
> $ G2p : int  1 1 1 1 1 1 1 1 1 1 ...
> $ G2q : int  1 1 1 1 1 1 1 1 1 1 ...
> $ G3p : int  1 1 1 1 1 1 1 1 1 1 ...
>
> m<-mona(hc)
> Error in mona(hc) : All variables must be binary (factor with 2 
> levels).
>

You have to be careful that the data are indeed each factors with 2 
levels (numeric variables with values 1 and 2 will not do).  A summary 
of the data will tell you that.

Sean

> I find this strange when the cluster dataset "animals" have the same 
> structure as my data.
>
> srt(animals)
> `data.frame':   20 obs. of  6 variables:
> $ war: int  1 1 2 1 2 2 2 2 2 1 ...
> $ fly: int  1 2 1 1 1 1 2 2 1 2 ...
> $ ver: int  1 1 2 1 2 2 2 2 2 1 ...
> $ end: int  1 1 1 1 2 1 1 2 2 1 ...
> $ gro: int  2 2 1 1 2 2 2 1 2 1 ...
> $ hai: int  1 2 2 2 2 2 1 1 1 1 ...
>
> m<-mona(animals) #works fine
>
> what is this error trying to tell me?
> mvh
> morten
>
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