[R] about string

[Jacques VESLOT]

?nchar
sapply(strsplit("f:\\JPCS_signal.txt", "_"), function(x) substring(x[1], 4))
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Jacques VESLOT

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XinMeng a écrit :
> 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£ºxmeng at capitalbio.com 
> Address:18 Life Science Parkway, 
> Changping District, Beijing 102206, China
> 
> 
> 
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