Find first non-missing element
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(...)
... |
< |
A vector the same length as the first ... argument with
missing values replaced by the first non-missing value.
na_if() to replace specified values with a NA.
tidyr::replace_na() to replace NA with a value
# Use a single value to replace all missing values x <- sample(c(1:5, NA, NA, NA)) coalesce(x, 0L) # 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) # Supply lists by with dynamic dots vecs <- list( c(1, 2, NA, NA, 5), c(NA, NA, 3, 4, 5) ) coalesce(!!!vecs)
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