B77S <bps0002 <at> auburn.edu> writes:
>
> I have never used that function, but I know that with read.csv() you can do
> the following to select only the columns you want:
>
> chosen_vars <- read.csv("Workbook1.csv", header=T)[c("variable1",
> "variable3")]
>
This is not actually selectively importing: it's importing the
whole thing and *then* selecting the relevant columns.
If the original poster is trying to avoid importing the whole
data set because (for example) it's got a gigantic number of
columns and will be very slow and/or tax their system, then this
idiom won't help.
Ben Bolker
______________________________________________
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.
