[R] How to sort a dataframe?

[Spencer Graves]

 > df1 <- data.frame(a=rep(2:1, 2), b=rep(2:1, each=2), c=1:4)
 > df1[order(df1$b, df1$a),]
   a b c
4 1 1 4
3 2 1 3
2 1 2 2
1 2 2 1

Spencer Graves

Ravi Varadhan wrote:
> 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
>>>
>>>______________________________________________
>>>R-help at stat.math.ethz.ch mailing list
>>>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>>
>>______________________________________________
>>R-help at stat.math.ethz.ch mailing list
>>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>>
> 
> 
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