Given a set of vectors, coalesce() finds the first non-missing value at each position. This is inspired by the SQL COALESCE function which does the same thing for NULLs.

coalesce(...)

## Arguments

... Vectors. Inputs should be recyclable (either be length 1L or n) and coercible to a common type.

## Details

Currently, coalesce() type checking does not take place.

na_if() to replace specified values to a NA.

replace_na() to replace a NA with a value.

## Examples

# Use a single value to replace all missing vectors
x <- sample(c(1:5, NA, NA, NA))
coalesce(x, 0L)
#> [1] 4 0 3 0 1 5 0 2
# Or match together a complete vector from missing pieces
y <- c(1, 2, NA, NA, 5)
z <- c(NA, NA, 3, 4, 5)
coalesce(y, z)
#> [1] 1 2 3 4 5