[R] Identify Objects that end with .f (and all caps)

From: Sparks, John James <jspark4_at_uic.edu>
Date: Sat, 14 May 2011 14:38:20 -0500


Dear R Helpers,

I am trying to find a way to identify all the objects in my environment that are all caps and then end with .f. I can do the all caps part pretty easily, but I have tried a number of variations on the \ and can't get a recognition of that operator. As a simple example

A.f<-"foo1"
AA.f<-"foo2"
aa.f<-"foo3"
A.a<-"foo4"
ls()
[1] "A.a" "A.f" "aa.f" "AA.f"
temp1<-ls(pattern="[A-Z]")
temp1
[1] "A.a" "A.f" "AA.f"
> temp2<-ls(pattern=\f)

Error: unexpected input in "temp2<-ls(pattern=\"

The end goal is to isolate A.f and AA.f and not the others. In terms of just getting the 'ending with .f' portion, I have tried a number of variations in the pattern=\f, but can't get R to recognize what I want.

Your guidance would be much appreciated. --John J. Sparks, Ph.D.



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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. Received on Sat 14 May 2011 - 19:40:44 GMT

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