Hi Pascal,
One thing you can do is to work on indexes, count unique occurences and
assign them, as following:
index - as.data.frame(table(index[,1],index[,2]))
index - do.call(cbind,lapply(index, as.numeric)) # ensures numeric
coding (as table turns into factors)
occurence[index[,1:2]] -
Pascal BLEUYARD p.bleuyard at opgc.univ-bpclermont.fr writes:
:
: Hi all,
:
: I need to compute some occurence matrix: given a zero matrix and a set
: of paired indexes, I want to store the number of occurences of each paired
: index in a matrix. The paired indexes are stores as an index
