On 07/26/2018 08:58 PM, JEFFERY REICHMAN wrote:
Given something like ...
x <- c(3,2,4,3,5,4,3,2,4,5)
y <- c("A","B","B","A","A","A","A","B","A","B")
xy <- data.frame(x,y)
xy$w <- ifelse(xy$y=="A",xy$w[,x]*10,xy$w[,x]*15 )
You should learn the basics about how to extract or replace part of an
object, in particular data.frames. You can start by reading the help
page of ?"Extract".
xy$w <- ifelse(xy$y=="A",xy$x*10,xy$x*15 )
HTH,
Denes
want to see
x y w
1 3 A 30
2 2 B 30
3 4 B 60
4 3 A 30
5 5 A 50
6 4 A 40
7 3 A 30
8 2 B 30
9 4 A 40
10 5 B 75
but I get NA's
Jeff
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______________________________________________
[email protected] mailing list -- To UNSUBSCRIBE and more, see
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.
