[R] inserting columns in the middle of a dataframe

Jon Minton jm540 at york.ac.uk
Thu Sep 14 00:42:43 CEST 2006

Thanks, but isn't that only for elements in vectors?

I think I've found the following method to work:

e.g. for 
df <- data.frame(v1,v2,v3,v4)


df <- data.frame(df[1:2],v5,df[-c(1:2)])

I *believe* this is the one-line solution I was looking for. Can anyone see
why this wouldn't work?


-----Original Message-----
From: Christos Hatzis [mailto:christos at nuverabio.com] 
Sent: 13 September 2006 23:22
To: 'Jon Minton'; r-help at stat.math.ethz.ch
Subject: RE: [R] inserting columns in the middle of a dataframe

See ?append


-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Jon Minton
Sent: Wednesday, September 13, 2006 5:14 PM
To: r-help at stat.math.ethz.ch
Cc: 'Jon Minton'
Subject: Re: [R] inserting columns in the middle of a dataframe

Dear R users:


Is there a built-in and simple way to insert new columns after other columns
in a dataframe?


I.e. currently I have:


V1 V2 V3 V4





But I want 

                V1 V5 V2 V3 V4





Can this be done in one line?


Jon Minton



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