Is sapply really necessary here?
exc = !names(d) %in% "d3"
d[,exc] = round(d[,exc])
d
d1 d2 d3 d4
1 10 6 2.3749642 -4
2 11 6 -0.2081097 -2
3 10 4 1.2675955 -4
4 10 8 1.2468859 -2
5 10 6 2.7193027 -4
6 9 6 1.9195531 -5
7 9 6 2.8188036 -6
8 10 7 2.5755148 -4
9 11 5 2.4037376 -6
10 11 5 3.4295063 -5
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Fri, 14 Jan 2011, Joshua Wiley wrote:
Hi Pete,
Here is one option. The first part of sapply() just serves to get all
names of d except those you excluded in 'exc'. If you were including
fewer variables than you were excluding, just get rid of the logical !
operator.
d <- data.frame(d1 = rnorm(10, 10), d2 = rnorm(10, 6),
d3 = rnorm(10, 2), d4 = rnorm(10, -4))
exc <- "d3"
cbind(d[, exc, drop = FALSE],
sapply(names(d)[!names(d) %in% exc], function(x) round(d[, x])))
HTH,
Josh
On Fri, Jan 14, 2011 at 8:53 PM, Pete B <peter.breckn...@bp.com> wrote:
Hi All
I am trying to use the round function on some columns of a dataframe while
leaving others unchanged. I wish to specify those columns to leave
unchanged.
My attempt is below - here, I would like the column d3 to be left but
columns d1, d2 and d4 to be rounded to 0 decimal places. I would welcome any
suggestions for a nicer way of doing this.
d1= rnorm(10,10)
d2= rnorm(10,6)
d3= rnorm(10,2)
d4= rnorm(10,-4)
d = data.frame(d1,d2,d3,d4)
x= NULL
for (i in 1:ncol(d)){
if (colnames(d)[i] =="d3"){x[i] = d[i]
} else { x[i] = round(d[i])}
out = do.call(cbind,x)
}
colnames(out) = colnames(d)
Thanks and regards
Pete
--
View this message in context:
http://r.789695.n4.nabble.com/Rounding-variables-in-a-data-frame-tp3218729p3218729.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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.
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
______________________________________________
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.
______________________________________________
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.
