Message-ID: <3A822319EB35174CA3714066D590DCD50994E7F4@usrymx25.merck.com>
Date: 2005-03-07T18:15:10Z
From: Liaw, Andy
Subject: Writing to a file
Would the following do?
x <- 1000
write.table(Info[Info[,4] > x, c(1, 4)], file="/tmp/CT.dat")
Andy
> From: Melanie Vida
>
> Here is a simple question. Is there a quicker way to write to a file
> several rows of data at a time rather than one line at a
> time? How can
> the code below be optimized to write several rows at a time to a file
> rather than one line at a time. See my slow method of
> write.table below:
>
> ---------------------------
> x<-1000
> for( i in 1:385420)
> (
> if(Info[i,4] > x)
> write.table (cbind(Info[i,1], Info[i,4], file="/tmp/CT.dat",
> append=TRUE, row.names=FALSE, col.names=FALSE)
>
> Thanks,
>
> -Melanie
>
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