dfr <- data.frame(sample(1:50,10),sample(1:50,10))
colnames(dfr) <- c("a","b")
dfr <- dfr[order(dfr$a),]
dfr <- dfr[order(-dfr$a),]-----Original Message----- From: Mario Morales [mailto:[EMAIL PROTECTED] Sent: Thursday, March 31, 2005 10:23 PM To: r-help@stat.math.ethz.ch Subject: [R] a R function for sort a data frame. Is there a R function for sort a data frame by a variable ? I know sort a vector, but I don't know sort a data frame by a column. Can you help me ? the sort() function don't work with data frame. ______________________________________________ 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 ______________________________________________ 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
