[R] more or less pager
Steve Sullivan
ssullivan at qedgroupllc.com
Fri Feb 6 18:05:50 CET 2004
David, try fix() or names() with your dataframe (to view column names +
data and column names, respectively).
STS
-----Original Message-----
From: David A. van Leeuwen [mailto:davl-s0p0a0m at cistron.nl]
Sent: Friday, February 06, 2004 10:07 AM
To: r-help at stat.math.ethz.ch
Subject: [R] more or less pager
R-users,
(forgive my return adres)
I've been breaking my head why R---which i find fabulous, by the
way---does not pipe interactive output through a pager (more or less),
like it does with help(), or like GNU Octave does with arrays with more
than terminal height rows.
Maybe it is my installation (Debian/GNU Linux). Maybe it is my
configuration, but i don't think so because with help() it works
## Default pager
PAGER=${PAGER-'/usr/bin/less'}
But i think it really is because R-users apparently don't look at
dataframes with more than, say, 24 rows. I always seem to be
intetrested
in column names with some rows of data, so often I type
> data[1,]
just to see what the columns were called again.
In order to circumvent the problem of data running off the screen, I've
made a simple hack:
more <- function(x) {
tmp <- paste("/tmp/R", floor(runif(1,0,1e6)), sep=".")
sink(tmp)
print(x)
sink()
file.show(tmp, delete.file=TRUE)
}
which isn't the prettiest implementation of `tmpfile', but hey, it
allows my to type
> more(data)
Please ignore this if there is a more proper way of doing this in R
(preferrably by default without the more()), but also please include
some reference to this under keywords `pager', `more' or `less' in the
documentation.
Developers, thanks for all the work.
--
David A. van Leeuwen < @ElseWare.nl>
Echt stijlvol sterven doe je / bij een ander op de mat
Op de dag dat je bezorgd wordt / door het NRC Handelsblad
---Joop Visser
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