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?
Thanks! Mark
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