grep - How do I mimic `ls foo*bar` in R? -


completely stumped, though seems simple question voted down shortly duplicate, couldn't find right "pattern" search answer.

i looking files in folder match dual pattern , want open them in r. so, assume list.files produces following:

lf <- c("foo_23_bar.txt", "goo_42_mar.txt", "boo_42_bar.txt")

in command line, use ls foo*bar find first file, in r, like,

grep(paste("foo","bar",sep="|"),lf)

returns both files 1 , 3. not sure how use perl=true option. great. thanks!

i use system function. check out here. http://stat.ethz.ch/r-manual/r-patched/library/base/html/system.html


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