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...happen close to what R considers infinity. Typing 1.799e+308 into R returns Inf. I hope the above limited in scope analysis is informative. Best regards, Ioannis -- Dr Ioannis Kosmidis Department of Statistical Science, University College, London, WC1E 6BT, UK Webpage: http://www.ucl.ac.uk/~ucakiko

Hi I have a character matrix with 2 columns A and B, If I want to sort the matrix based on the column B, but based on a specific order of characters: mat<-cbind(c('w','x','y','z'),c('a','b','c','d')) ind<-c('c','b','d','a') I want "mat" to be sorted by the sequence in "ind":