Determine Which Values are Missing Values

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Description

which.na returns an integer vector describing which values in the input vector, if any, are missing

Usage

1

Arguments

x

a data object

Value

integer vector containing indices of elements in x which are missing. If there are no missing values, the functions return an integer vector of length 0 ( numeric(0)).

Author(s)

Knut M. Wittkowski kmw@rockefeller.edu

See Also

is.na

Examples

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x <- c(1, 4, NA, 0, 5)
which.na(x)
# [1] 3