R help - Jun 2005 - How to sort a dataframe by one variable

Hi there,

Could anybody help me on how to sort a dataframe by one variable in the 
dataframe?

Thank you

Lisa Wang
Princess Margaret Hospital
Toronto, Ca
tel: 416 946 4501

Lisa Wang wrote:
> Hi there,
> 
> Could anybody help me on how to sort a dataframe by one variable in the 
> dataframe?
> 
> Thank you
> 
See ?order.

x <- data.frame(a = runif(10), b = 1:10)
x[order(x$a), ]


--sundar

Try RSiteSearch("Sort data frame").

Anyhow, use order() or sort.list() as follows:

dat[order(dat[,'myColumn']),]#Sorts data.frame dat by column
"myColumn"
dat<-dat[sort.list(dat$myColumn, decreasing = T),] #Another option to do the 
same.  You can specify decreasing or increasing within both function

Cheers

Francisco
>From: Lisa Wang <lisawang at uhnres.utoronto.ca>
>To: R-Help <r-help at stat.math.ethz.ch>
>Subject: [R] How to sort a dataframe by one variable
>Date: Tue, 28 Jun 2005 17:39:40 -0400
>
>Hi there,
>
>Could anybody help me on how to sort a dataframe by one variable in the
>dataframe?
>
>Thank you
>
>Lisa Wang
>Princess Margaret Hospital
>Toronto, Ca
>tel: 416 946 4501
>
>______________________________________________
>R-help at 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