----- Original Message -----
From: "Covelli Paolo" <pcove...@tele2.it>
To: <r-help@r-project.org>
Sent: Thursday, April 08, 2010 9:05 AM
Subject: [R] use read.table for a partial reading
Hi everyone,
I've got a matrix data with 20 variables (V1, V2, V3, ...) and 215 rows
(observations). I'm interested to read only the first and second
variables using "read.table" function. How can I do?
You do not provide a reproducible example (see
http://www.R-project.org/posting-guide.html), so my comments are somewhat of
a guess.
Typically, when you read in data from a file in R, you read it into a 'data
frame' not a matrix.
(To earn more
http://cran.r-project.org/doc/manuals/R-intro.html#Lists-and-data-frames)
This is how you would get your data (the dataframe) in the form you desire:
dat <- read.table("mydata.txt", header = TRUE)
dat2 <- dat[,1:2] # contains just the first two variables, V1 and V2
Thanks in advance.
Paolo.
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PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
