Message-ID: <49F47012.90202@statistik.tu-dortmund.de>
Date: 2009-04-26T14:30:42Z
From: Uwe Ligges
Subject: fclustindex, e1071 package
In-Reply-To: <E1A8A5DE5B1C9C48AE1D9E4CAB8BA0690B2A4A@Bender>
Caroline Wallis wrote:
> Hi,
>
> I'm using e1071 package to do fuzzy cluster analysis. My dataset (ra) has
> 5237 observations and 2 variables - depth and velocity. I used fuzzy cmeans
> to create 6 fuzzy classes.
>
>
>> ra.flcust6<-cmeans(ra,6,iter.max=100,verbose=F,dist="euclidean",method="cmea
> ns",m=1.7,rate.par=NULL,weights=1)
>
>
>
> I would like to calculate the value of all the fuzzy validity measures using
> the flcustIndex function. However it returned the following error:
>
>
>
>> fclustIndex(ra.flcust6,ra,index="all")
> Error in solve.default(scatter[, , i]) :
> Lapack routine dgesv: system is exactly singular
>
>
>
>
> Please could anyone explain what this means and what I have done wrong?
Well, it tells you that the matrix is exatcly singular. At first I'd
check your data if this is plausible.
Uwe Ligges
>
>
> thanks
>
> Caroline Wallis
>
>
>
>
> [[alternative HTML version deleted]]
>
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