[R] Negative value for adjustedRandIndex?
ookiit at hotmail.com
Thu May 21 14:28:37 CEST 2009
I am a very new user to R so please have patience with me. :clap:
I am trying to evalute the "internal response" for a couple of different
cluster methods with the help of the AdjustedRandIndex, which is included in
the mclust package.
However, I do get a bit puzzled when I get a negative value as the value
should be in intervall of [0,1], am I correct? Have I done something wrong?
Or should I interpret the negative value as the two methods do not group the
cases to the same cluster?
I have for example used k-means and k-median, and choosen five clusters.
Each respondent has been labelled as either beloning to cluster 1,2,3,4 or
5. I have picked out the first 32 respondents.
a <- c(1,2,3,4,5,2,1,5,1,2,2,4,2,3,3,2,4,5,5,4,4,4,5,5,2,3,1,5,5,5,4,1)
b <- c(5,5,5,2,5,3,2,2,2,5,3,4,5,5,2,5,2,3,5,5,5,3,5,3,3,2,4,5,2,2,2,3)
Thanks in advance,
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