[R] data extraction

[Dimitris Rizopoulos]

you need something like:

new.data <- data[seq(10, nrow(data), 10), ]


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: "yohannes alazar" <hannesalazar at gmail.com>
To: <r-help at stat.math.ethz.ch>
Sent: Friday, June 30, 2006 1:45 PM
Subject: [R] data extraction


Dear mailing list I have a data that have 20,000 rows and 20 columns. 
Io
wonted to extract the 10th row only. Example the 10th, 20th, 30th 
40th...20000
th. can you please help me how do I do that.Than kyou.
Example is below.
Inpute:
AG GG GG AG
CC CC CC CC
CT CC CT CT
GG GG GG GG
CC CC CC CC
GG GG GG GG
CC CC CC CC
GG CG CG GG
GG GG GG GG
*CC CC CC CC*
AA AG AG AA
AA AA AA AA
GG AG AG GG
GG AG AG GG
GG GG GG GG
TT TT TT TT
AA AG AG AA
CT CC CT TT
AG AA AG GG
*AA AA AG AG*
AA AA AA AA
CC CC CC CG
GG GG GG AG
CT TT CT CT
AT AA AT AT
GG GG GG AG
CG CC CG GG
GG GG GG AG
CC CC CC CT
GG GG GG GG
*GG GG AG AG
*CC CC CC CT
TT TT TT CT
AG GG AG AG
GG GG GG GG
AG AG AA AA
AG GG AG AA
CT TT CT CT
CT CT CC CT
*AC CC AC AC*

output
*CC CC CC CC
AA AA AG AG
GG GG GG GG
AC CC AC AC*

thankyou a lot inadvance!

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