Oats[Oats$Variety %in% c("Victory", "Golden Rain"),]
or
subset(Oats, Variety %in% c("Victory", "Golden Rain"))Stefano -----Messaggio originale----- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] conto di elyakhlifi mustapha Inviato: lunedì 23 aprile 2007 9.56 A: R-help@stat.math.ethz.ch Oggetto: [R] extract from a data frame hello, I'd like know how to do to extract data from a frame for example how can I do to extract only the data where variety=victory or variety=golden rain thanks. > Oats Block Variety nitro yield 1 I Victory 0.0 111 2 I Victory 0.2 130 3 I Victory 0.4 157 4 I Victory 0.6 174 5 I Golden Rain 0.0 117 6 I Golden Rain 0.2 114 7 I Golden Rain 0.4 161 8 I Golden Rain 0.6 141 9 I Marvellous 0.0 105 10 I Marvellous 0.2 140 11 I Marvellous 0.4 118 12 I Marvellous 0.6 156 13 II Victory 0.0 61 14 II Victory 0.2 91 15 II Victory 0.4 97 16 II Victory 0.6 100 17 II Golden Rain 0.0 70 18 II Golden Rain 0.2 108 19 II Golden Rain 0.4 126 20 II Golden Rain 0.6 149 21 II Marvellous 0.0 96 22 II Marvellous 0.2 124 23 II Marvellous 0.4 121 ___________________________________________________________________________ Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses [[alternative HTML version deleted]] ______________________________________________ R-help@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 and provide commented, minimal, self-contained, reproducible code.
