Why not use
con <- pipe(COMMAND)
foo <- read.delim(con, colClasses="numeric")
close(con)
? See the 'R Data Input/Output Manual'.
On Fri, 12 Sep 2008, Michael A. Gilchrist wrote:
Hello,
I am currently using R to run an external program and then read the results
the external program sends to the stdout which are tsv data.
When R reads the results in it converts it to to a list of strings which I
then have to maniuplate with a whole slew of commands (which, figuring out
how to do was a reall challenge for a newbie like myself)--see below.
Here's the code I'm using. COMMAND runs the external program.
rawInput= system(COMMAND,intern=TRUE);##read in tsv values
rawInput = strsplit(rawInput, split="\t");##split elements w/in the list
##of character strings by "\t"
rawInput = unlist(rawInput); ##unlist, making it one long vector
mode(rawInput)="double"; ##convert from strings to double
finalInput = data.frame(t(matrix(rawInput, nrow=6))); ##convert
Because I will be doing this 100,000 of times as part of an optimization
problem, I am interested in learning a more efficient way of doing this
conversion.
Any suggestions would be appreciated.
Thanks in advance.
Mike
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web: http://eeb.bio.utk.edu/gilchrist.asp
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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