xkey: Set the primary keys in a table
In HikaGenji/fql: Functional Query Language

Usage Arguments Value Author(s) See Also Examples

1	xkey(d, keys)

`d`	A dataframe
`keys`	A character vector of column keys

A dataframe with a key attribute

JFP

lj

  x <- data.frame(a=c(1,2,3),
                  b=c("x", "y", "z"),
                  c=c(10, 20, 20)
  )
  y <- data.frame(a=c(1,3),
                  b=c("x", "z"),
                  c=c(1,2),
                  d=c(10,20))
  
  x %>% lj(y %>% xkey(c("a", "b")))