On 5/8/21 10:00 AM, Steven Yen wrote:
Below, the first command simply creates a list of 16 names (labels)
which can be ignore.
In the 2nd and 3rd commands, I am able to identify names containing
"black".
In line 4, I am trying to identify names containing "black" or
"conserv" but obviously it does not work. Can someone help? Thanks.
> names<-names(tp.nohs$estimate)[c(1:8,58:65)]; names
[1] "x1.one" "x1.black" "x1.othrrace" "x1.moddkna"
"x1.conserv" "x1.nstrprty"
[7] "x1.strrep" "x1.sevngprt" "x2.one" "x2.black"
"x2.othrrace" "x2.moddkna"
[13] "x2.conserv" "x2.nstrprty" "x2.strrep" "x2.sevngprt"
> grep("black",names,value=TRUE)
[1] "x1.black" "x2.black"
> grep("black",names,value=FALSE)
[1] 2 10
> grep(c("black","conserv"),names,value=TRUE)
[1] "x1.black" "x2.black"
Warning message:
In grep(c("black", "conserv"), names, value = TRUE) :
argument 'pattern' has length > 1 and only the first element will be
used
Try using the logical OR operator (vertical bar, AKA "pipe")
grep(c("black|conserv"), names, value=TRUE)
--
David.
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______________________________________________
R-help@r-project.org 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.
