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2008 Jan 04
3
slow access to matrix dimnames
hello,
i have been trying to convert my data frames to matrices in the hopes of
speeding up some of my more complicated scripts.
to assist with this, i am trying to create a "matrix column operator"
like $:
"%$%" = function(data,field) {
as.numeric(data[,grep(field,unlist(dimnames(data)[2]))])
}
the idea here is that you can use a matrix like a dataframe: