[R] how to GREP out a string like this......THANKS.

[arun]

Hi,
May be this helps.

lines<- readLines(textConnection("NM_019397 // Egfl6 // EGF-like-domain, multiple 6 // X F5|X 71.5 cM // 54156
NM_019397 // Egfl7 // EGF-like-domain, multiple 6 // X F5|X 71.5 cM // 54158"))
library(stringr)
word(lines,2,sep=" // ")
#[1] "Egfl6" "Egfl7"

lines1<- readLines(textConnection("NM_019397 // Egfl6 // EGF-like-domain, multiple 6 // X F5|X 71.5 cM // 54156
NM_019397 // Egfl7 domain // EGF-like-domain, multiple 6 // X F5|X 71.5 cM // 54158"))
 word(lines1,2,sep=" // ")
#[1] "Egfl6"        "Egfl7 domain"
A.K.



----- Original Message -----
From: Hon Kit (Stephen) Wong <honkit at stanford.edu>
To: r-help at r-project.org
Cc: 
Sent: Monday, May 20, 2013 7:45 PM
Subject: [R] how to GREP out a string like this......THANKS.

Dear ALl,

I hope you could help me out on this simple problem. I have many thousand lines like this:
NM_019397 // Egfl6 // EGF-like-domain, multiple 6 // X F5|X 71.5 cM // 54156

I want to extract the string inside the first // //, in this case is Egf16. 


How do I apply grep function?

Thanks.

Stephen HK Wong

Stephen HK Wong
Research Associate,Cleary Lab
Lab Phone: 650-723-5340
MC 5457 
Lokey Stem Cell Research Building 
265 Campus Drive, Rm. G2035 
Stanford, California 94305-5324

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