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" <[EMAIL PROTECTED]> To: <[email protected]> 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! [[alternative HTML version deleted]] -------------------------------------------------------------------------------- > ______________________________________________ > [email protected] 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 ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
