Hi,
Try this:
vec1<-c("A_cont_1", "A_cont_12", "B_treat_8", "AB_cont_22", "cont_21_Aa")
vec2<-grep("(A){0,1}.*cont.*2",vec1)
vec1[vec2]
[1] "A_cont_12" "AB_cont_22" "cont_21_Aa"
A.K.
----- Original Message -----
From: Zhipeng Wang <wa...@kuhp.kyoto-u.ac.jp>
To: r-help@r-project.org
Cc:
Sent: Saturday, June 23, 2012 6:19 AM
Subject: [R] matching a string with multiple conditions using grep
Suppose I have a vector ["A_cont_1", "A_cont_12", "B_treat_8",
"AB_cont_22", "cont_21_Aa"], I hope I can extract the strings which include
3 short strings, say "A", "cont" and "2", that is to say, "A_cont_12",
"AB_cont_22" and "cont_21_Aa" will be extract, using a relatively short
code (using grep?).
Would you please to give some idea? Thank you !
[[alternative HTML version deleted]]
______________________________________________
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.
