[R] adding two colmns of a data frame

[John Kane]

You mean like this?
mydata <- data.frame(aa=1:5, bb=1:5)
mydata[,3] <- mydata[,1] + mydata[,2]
mydata

--- On Sat, 4/16/11, ozgrerg <ozgrgun at gmail.com> wrote:

> From: ozgrerg <ozgrgun at gmail.com>
> Subject: [R] adding two colmns of a data frame
> To: r-help at r-project.org
> Received: Saturday, April 16, 2011, 4:22 PM
> It seems very simple but I could not
> find the way. I just want to add two
> columns of a data frame. I am doing the below operation: 
> 
> data$C=transform(data, data$A+data$B)
> 
> However that return as a data frame. I will be glad if ypu
> help. Thanks a
> lot
> 
> 
> 
> 
> 
> 
> --
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