check_dt_by {joyn} | R Documentation |
Check dt by
vars
Description
check variable(s) by which data frames are joined: either a single by
var, common to right and left dt,
or
Usage
check_dt_by(x, y, by, by.x, by.y)
Arguments
x |
left table |
y |
right table |
by |
character: variable to join by (common variable to x and y) |
by.x |
character: specified var in x to join by |
by.y |
character: specified var in y to join by |
Value
character specifying checked variable(s) to join by
Examples
## Not run:
x = data.table(id1 = c(1, 1, 2, 3, 3),
id2 = c(1, 1, 2, 3, 4),
t = c(1L, 2L, 1L, 2L, NA_integer_),
x = c(16, 12, NA, NA, 15))
y = data.table(id = c(1, 2, 5, 6, 3),
id2 = c(1, 1, 2, 3, 4),
y = c(11L, 15L, 20L, 13L, 10L),
x = c(16:20))
# example specifying by.x and by.y
joyn:::check_dt_by(x, y, by.x = "id1", by.y = "id2")
## End(Not run)
[Package joyn version 0.2.4 Index]