[R] inserting columns in the middle of a dataframe

[Berton Gunter]

Please folks -- use indexing.

myframe<-myframe[,c(1,5,2,3,4)]

Which begs the question: why bother rearranging the columns anyway, since
one can get them used, printed, etc. in any order you wish anytime you want
just by specifying the indices in the order you want them. I suspect the
question was motivated by too much Sas- or Excel -ism.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Timothy Bates
> Sent: Wednesday, September 13, 2006 3:05 PM
> To: Jon Minton; r-help at stat.math.ethz.ch
> Subject: Re: [R] inserting columns in the middle of a dataframe
> 
> 
> > Is there a built-in and simple way to insert new columns in 
> a dataframe?
> 
> You do this by collecting the columns in the new order you desire, and
> making a new frame.
> 
> oldframe           <- data.frame(matrix(0:14,ncol=3))
> newcol              <- data.frame(20:24)
> names(newcol) <- "newcol"
> newframe         <- data.frame(c(oldframe[1],newcol, oldframe[2:3]))
> 
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