Message-ID: <1930216316.8287881.1462052327296.JavaMail.yahoo@mail.yahoo.com>
Date: 2016-04-30T21:38:47Z
From: Elahe chalabi
Subject: how to use AND in grepl
Hi all,
I have one factor variable in my df and I want to extract the names from it which contain both "t2" and "pd":
'data.frame': 36919 obs. of 162 variables
$TE :int 38,41,11,52,48,75,.....
$TR :int 100,210,548,546,.....
$Command :factor W/2229 levels "_localize_PD","_localize_tre_t2","_abdomen_t1_seq","knee_pd_t1_localize","pd_local_abdomen_t2"...
I have tried this but I did not get result:
t2pd=subset(df,grepl("t2",Command) & grepl("pd",Command))
does anyone know how to apply AND in grepl?
Thanks
Elahe