[R] merge function

[John Kane]

As Burt says it is not exactly clear what you want but is something like this what you are looking for?

dat1  <-  data.frame(aa = c("a", "b", "c"), bb = 1:3)
dat2  <-  data.frame(xx = c("b", "c", "d"), yy = 3:1)
merge(dat1, dat2, by.x = "aa", by.y = "xx")

For further reference here are some suggestions about asking questions on the R-help list.  In particular it is very helpful if data is supplied in dput() form (See ?dput for details)

John Kane
Kingston ON Canada


> -----Original Message-----
> From: r-help at r-project.org
> Sent: Mon, 1 Jun 2015 13:46:15 +0000 (UTC)
> To: r-help at r-project.org
> Subject: [R] merge function
> 
> Hi,By default the merge function should take the intersection of column
> names (if this is understood from by = intersect(names(x), names(y)), but
> it takes all columns. How to specify the intersection of column names?
>  Thanks
> Carol
> 
> 	[[alternative HTML version deleted]]
> 
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