[R] How to sort a dataframe?

[Liaw, Andy]

mydata[order(mydata$col1, mydata$col2, mydata$col3, ...), ]

HTH,
Andy

> -----Original Message-----
> From: Ravi Varadhan [mailto:rvaradha at jhsph.edu]
> Sent: Monday, April 07, 2003 6:22 PM
> To: Spencer Graves
> Cc: rhelp; den.duurs at lycos.com
> Subject: Re: [R] How to sort a dataframe?
> 
> 
> 
> How does one sort a dataframe on multiple columns, say you first sort 
> on variable 1 and then on variable 2, etc.? Is there a simple, one-
> liner to do this?
> 
> thanks,
> Ravi.
> 
> ----- Original Message -----
> From: Spencer Graves <spencer.graves at pdf.com>
> Date: Monday, April 7, 2003 2:07 pm
> Subject: Re: [R] How to sort a dataframe?
> 
> > > tester <- data.frame(one=c(3,2,1), two=c(2,3,1))
> > > tester[order(tester$one),]
> >   one two
> > 3   1   1
> > 2   2   3
> > 1   3   2
> > >
> > Spencer Graves
> > 
> > Remko Duursma wrote:
> > > Dear R-helpers,
> > > 
> > > for the purpose of plotting a dataframe, i am trying to sort a 
> > dataframe by one column, for example
> > > 
> > > tester <- data.frame(one=c(3,2,1), two=c(2,3,1))
> > > 
> > > #> tester
> > > #  one two
> > > #1   3   2
> > > #2   2   3
> > > #3   1   1
> > > 
> > > # I want to sort "tester" by column "one", so that i get 
> a dataframe
> > > # that looks like:
> > > #one two
> > > #1    1
> > > #2    3
> > > #3    2
> > > 
> > > I know of 'sort' but it can only sort vectors.
> > > 
> > > Thanks for your help,
> > > 
> > > Remko Duursma
> > > 
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> > 
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> >
> 
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