[R] To summary data

[John Kane]

One way is to use the reshape2 package
===============================
library(reshape2)
dcast(xx,  A ~ . , sum)
================================

John Kane
Kingston ON Canada


> -----Original Message-----
> From: mrzung46 at gmail.com
> Sent: Sun, 13 May 2012 22:14:02 -0700 (PDT)
> To: r-help at r-project.org
> Subject: [R] To summary data
> 
> hi all,
> 
> my data is here,
> --------------------------------------------------------------------------------------------------
> data
> 
>   clss number
> 1    A      1
> 2    B      2
> 3    C      3
> 4    A      4
> 5    B      5
> 6    C      6
> 7    A      7
> 8    B      8
> 9    C      9
> -----------------------------------------------------------------------------------------------------
> I want to this format
> 
> clss number
> A      12
> B      15
> C      18
> 
> is there a way to solve this problem?
> 
> --
> View this message in context:
> http://r.789695.n4.nabble.com/To-summary-data-tp4629887.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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