gerald.j...@dgag.ca wrote:
Hello,
I am running:
R version 2.10.0 (2009-10-26)
Copyright (C) 2009 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
on a RedHat Linux box with 48Gb of memory.
I am trying to create a model.matrix for a big model on a moderately large
data set. It seems there is a size limitation to this model.matrix.
dim(coll.train)
[1] 677236 128
coll.1st.model.mat <- model.matrix(coll.1st.formula, data = coll.train)
dim(coll.1st.model.mat)
[1] 581618 169
Missing data?
nrow(df <- data.frame(a = 1:10 , b = c(2:10, NA)))
[1] 10
nrow(model.matrix(a ~ b, data = df))
[1] 9
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