[R] choosing multiple columns

[John Kane]

mydata[ , 1:8]


Or let's say you only one the 4th, 6th and 8th columns

mydata[ , c(4,6,8)]

and so on.  

There are several good intro's available on the R website that will walk you through this type of thing.

If you're a recovering SAS or SPSS user this paper may be of real help www.et.bs.ehu.es/~etptupaf/pub/R/RforSAS&SPSSusers.pdf


John Kane
Kingston ON Canada


> -----Original Message-----
> From: sachin.abeywardana at gmail.com
> Sent: Sat, 11 Aug 2012 21:59:59 +1000
> To: r-help at r-project.org
> Subject: [R] choosing multiple columns
> 
> Hi all,
> 
> I have a data frame that has the columns OFB1, OFB2, OFB3,... OFB10.
> 
> How do I select the first 8 columns efficiently without typing each and
> every one of them. i.e. I want something like:
> 
> a<-data.frame(initial_data$OFB1-10) #i know this is wrong, what would be
> the correct syntax?
> 
> Thanks,
> Sachin
> 
> 	[[alternative HTML version deleted]]
> 
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