Look at: ?Comparison; you need: PIKO[status == "snag", ]
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://www.med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "zhang jian" <[EMAIL PROTECTED]> To: "r-help" <[email protected]> Sent: Tuesday, April 18, 2006 4:45 PM Subject: [R] what happen? > Hi! > I want to choose part of the data. But it has a question. > >> attach(PIKO) >> PIKO[1:5,] > code species dbh x y tag status branch > 92 10142 PIKO 38.9 6.05 12.81 10165 alive 0 > 109 10213 PIKO 41.0 6.71 26.21 10202 alive 0 > 135 10222 PIKO 48.3 18.98 21.28 10214 alive 0 > 146 10223 PIKO 47.0 19.45 22.83 10224 alive 0 > 147 10223 PIKO 20.0 19.74 28.65 10225 alive 0 >> n=PIKO[dbh>=25,] >> n[1:5,] > code species dbh x y tag status branch > 92 10142 PIKO 38.9 6.05 12.81 10165 alive 0 > 109 10213 PIKO 41.0 6.71 26.21 10202 alive 0 > 135 10222 PIKO 48.3 18.98 21.28 10214 alive 0 > 146 10223 PIKO 47.0 19.45 22.83 10224 alive 0 > 152 10223 PIKO 33.5 16.94 27.25 10230 alive 0 > *> n=PIKO[status="snag",] > Error in "[.data.frame"(PIKO, status = "snag", ) : > unused argument(s) (status ...) > * > > [[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
