[BioC] silly looping question

[Nathalie Conte]

dear List,
Sorry for the silly question, but I am a R beginner and try to sort 
something out.
I have a vector named match containing N positions
match=c( "1_880238", "1_883625", "1_1222695", "1_2255524" ,"1_887560")
I have a big data frame containing a lot of infos (among those positions 
in the first column V1 in the same format as in the match vector, 
example.txt attached )
I want to create an index to pull out only informations in the data 
frame whose position are the the vector.
I have tried this simple loop

for (i in match)
index=example$V1==i

new=example[index,]

the new dataframe contain only the last true element...is there a way to 
get all TRUE ones?
thanks
Nathalie




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