[Rd] matrix operations
mvida at mac.com
Sun Feb 20 15:58:58 CET 2005
In R, I'm imported a data frame of 2,321,123 by 4 called "dataF".
I converted the data frame "dataF" to a matrix
dataM <- as.matrix(dataF)
Does R have an efficient routine to treat the special elements that
contain "inf" in them. For example, can you separate the rows that have
"inf" elements from the matrix into a separate matrix without iterating
over the entire matrix?
Also, does R have an efficient way to sort columns in a matrix?
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