try the following:
strg <- "abc"
nchar(strg)
############
strg <- c("f:\\JPCS_signal.txt", "f:\\PC1_signal.txt",
"f:\\PC2_signal.txt")
strg. <- sapply(strsplit(strg, "\\\\"), "[", 2)
sapply(strsplit(strg., "_"), "[", 1)
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: "XinMeng" <xmeng at capitalbio.com>
To: <r-help at stat.math.ethz.ch>
Sent: Tuesday, June 06, 2006 10:40 AM
Subject: [R] about string
> Hello sir:
> There are 2 questions about string.
> 1 How to calculate the width of a string? e.g string "abc"'s
width
> is 3;
> 2 How can I get the "substring" in such kind of condition:
> "f:\\JPCS_signal.txt" "f:\\PC1_signal.txt"
"f:\\PC2_signal.txt"
> What I wanna get is "JPCS" "PC1" "PC2".How
can I achieve them by R
> cammand?
>
> Thanks a lot!
>
> My best
>
>
>
>
> ------------------------------
> *******************************************
> Xin Meng
> Capitalbio Corporation
> National Engineering Research Center
> for Beijing Biochip Technology
> BioPharma-informatics & Software Dept.
> Research Engineer
> Tel: +86-10-80715888/80726868-6438
> Fax: +86-10-80726790
> Email??xmeng at capitalbio.com
> Address:18 Life Science Parkway,
> Changping District, Beijing 102206, China
>
>
--------------------------------------------------------------------------------
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
?nchar
sapply(strsplit("f:\\JPCS_signal.txt", "_"), function(x)
substring(x[1], 4))
-------------------------------------------------------------------
Jacques VESLOT
CNRS UMR 8090
I.B.L (2?me ?tage)
1 rue du Professeur Calmette
B.P. 245
59019 Lille Cedex
Tel : 33 (0)3.20.87.10.44
Fax : 33 (0)3.20.87.10.31
http://www-good.ibl.fr
-------------------------------------------------------------------
XinMeng a ?crit :> Hello sir:
> There are 2 questions about string.
> 1 How to calculate the width of a string? e.g string "abc"'s
width is 3;
> 2 How can I get the "substring" in such kind of condition:
> "f:\\JPCS_signal.txt" "f:\\PC1_signal.txt"
"f:\\PC2_signal.txt"
> What I wanna get is "JPCS" "PC1" "PC2".How
can I achieve them by R cammand?
>
> Thanks a lot!
>
> My best
>
>
>
>
> ------------------------------
> *******************************************
> Xin Meng
> Capitalbio Corporation
> National Engineering Research Center
> for Beijing Biochip Technology
> BioPharma-informatics & Software Dept.
> Research Engineer
> Tel: +86-10-80715888/80726868-6438
> Fax: +86-10-80726790
> Email??xmeng at capitalbio.com
> Address:18 Life Science Parkway,
> Changping District, Beijing 102206, China
>
>
>
> ------------------------------------------------------------------------
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
Hello sir: There are 2 questions about string. 1 How to calculate the width of a string? e.g string "abc"'s width is 3; 2 How can I get the "substring" in such kind of condition: "f:\\JPCS_signal.txt" "f:\\PC1_signal.txt" "f:\\PC2_signal.txt" What I wanna get is "JPCS" "PC1" "PC2".How can I achieve them by R cammand? Thanks a lot! My best ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology BioPharma-informatics & Software Dept. Research Engineer Tel: +86-10-80715888/80726868-6438 Fax: +86-10-80726790 Email??xmeng at capitalbio.com Address:18 Life Science Parkway, Changping District, Beijing 102206, China