[R] Sorting dataframe by different columns
Dear list, I have a very short question, Suggest a dataframe of four columns. df - data.frame(w,x,y,z) I want this ordered the following way: first by :x, decreasing = FALSE and secondly by: z, decreasing =TRUE How can this be done ? Thanks Gunther __ 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.
Re: [R] Sorting dataframe by different columns
probably the function sort.data.frame() posted in R-help some time ago can be useful; check: RSiteSearch(sort.data.frame) 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: Gunther Höning [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Sent: Friday, June 08, 2007 8:58 AM Subject: [R] Sorting dataframe by different columns Dear list, I have a very short question, Suggest a dataframe of four columns. df - data.frame(w,x,y,z) I want this ordered the following way: first by :x, decreasing = FALSE and secondly by: z, decreasing =TRUE How can this be done ? Thanks Gunther __ 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. Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm __ 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.
Re: [R] Sorting dataframe by different columns
maybe this page could give you some hints: http://www.ats.ucla.edu/STAT/r/faq/sort.htm Regards Knut __ 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.
Re: [R] Sorting dataframe by different columns
On the R wiki site there is a general-purpose function (sort.data.frame) that allows you to do this: sort(df, by=~ x-z) See: http://wiki.r-project.org/rwiki/doku.php?id=tips:data-frames:sort Regards, Kevin On 6/8/07, Gunther Höning [EMAIL PROTECTED] wrote: Dear list, I have a very short question, Suggest a dataframe of four columns. df - data.frame(w,x,y,z) I want this ordered the following way: first by :x, decreasing = FALSE and secondly by: z, decreasing =TRUE How can this be done ? Thanks Gunther __ 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. __ 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.
