On 25/04/2010 12:52 PM, Matthew Keller wrote:
Hi all,
Probably a rudimentary question. I have a flat file that looks like
this (the real one has ~10e6 elements):
10110100101001011101011
and I want to pull that into R as a vector, but with each digit being
it's own element. There are no separators between the digits. How can
I accomplish this? Thanks in advance!
Is it broken up into lines at all? Then read.fwf might be what you
want. If it's just a huge collection of 0s and 1s with no line breaks,
then use readChar(filename, nchar=1) to read the individual characters,
and later convert them to digits using ifelse(), e.g.
chars <- readChar(filename, nchar=1)
digits <- ifelse(chars=="1", 1, ifelse(chars == "0", 0, NA))
if (any(is.na(digits))) stop("not all 0s and 1s!")
Duncan Murdoch
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