Re: intersection of 2 dataframes

["Ronald WH Verwer" <R.Verwer@nin.knaw.nl>]

Using Paul Diderichsen's example

> f<-data.frame(a=c(1,2,3),b=c(2,2,3))

> g<-data.frame(a=c(3,2,1),b=c(2,2,3))

> h<-rbind(f,g)

I guess you actually want

> x <- which(duplicated(h))- length(f$a)

> x

[1] 2

which indicates that the 2 row in both frames are identical

kind regards

Ronald

Ronald W.H. Verwer

Netherlands Institute for Neuroscience

Meibergdreef 33

1105 AZ Amsterdam

The Netherlands

tel: 020-5665518

fax: 020-6961006

email: r.verwer@nin.knaw.nl

web-site:www.nin.knaw.nl/~verwer