[R] Combining logical operators to extract columns from a dataframe

[Erik Iverson]

mtb954 at gmail.com wrote:
> Hi R-helpers,
> 
> I have a dataframe (called data) with 100 columns, the columns of which are
> named with integers ranging from 1900 to 1999.
> 
> I wish to extract those columns which names are >=1950 and <=1970.
> 
> I tried:
> 
> data2<-subset(data,select=(names(data)>=1950 & names(data)<=1970))
> 
> but that doesn't work.
> 
> Any ideas?

## untested

data[as.character(1950:1970)]


> 
> Thanks! Mark
> 
> 	[[alternative HTML version deleted]]
> 
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