Compared to the base "==" operator in R, this function returns true if the two values are NA whereas the base "==" operator returns NA
is_equal(v1, v2)
boolean value of whether or not v1 and v2 are equal
is_equal(1,2)
#> [1] FALSE
# FALSE
is_equal(1,1)
#> [1] TRUE
# TRUE
1==NA
#> [1] NA
# NA
is_equal(1,NA)
#> [1] FALSE
# FALSE
NA==NA
#> [1] NA
# NA
is_equal(NA,NA)
#> [1] TRUE
# TRUE