%nin% finds non-matching elements in a given vector. It is the negation of %in%.
Arguments
- a
a vector (character, factor, or numeric)
- b
a vector (character, factor, or numeric)
Value
%nin% finds non-matching elements and returns one of two things, depending on the use. For two simple vectors,
it will report what matches and what does not. For comparing a vector within a data frame, it has the effect of reporting the rows
in the data frame that do not match the supplied (second) vector.
Details
This is a simple negation of %in%. I use it mostly for columns in a data frame.
Examples
library(tibble)
library(dplyr)
# Watch this subset stuff
dat <- tibble(x = seq(1:10), d = rnorm(10))
filter(dat, x %nin% c(3, 6, 9))
#> # A tibble: 7 × 2
#> x d
#> <int> <dbl>
#> 1 1 -0.319
#> 2 2 0.915
#> 3 4 -1.10
#> 4 5 -0.605
#> 5 7 -2.09
#> 6 8 -0.934
#> 7 10 -0.398