Hello, 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. Example: 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) adjustedRandIndex (a,b) [1] -0.01608168 Thanks in advance, Pooka -- View this message in context: http://www.nabble.com/Negative-value-for-adjustedRandIndex--tp23652402p23652402.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.