sum_isna {hutilscpp}

Number of missing values

Description

The count of missing values in an atomic vector, equivalent to to sum(is.na(x)).

Usage

sum_isna(x, do_anyNA = TRUE, nThread = getOption("hutilscpp.nThread", 1L))

Arguments

x

An atomic vector.

do_anyNA

Should anyNA(x) be executed before an attempt to count the NA's in x one-by-one? By default, set to TRUE, since it is generally quicker. It will only be slower when NA is rare and occurs late in x.

Ignored silently if nThread != 1.

nThread

nThread

Number of threads to use.

Examples

sum_isna(c(1:5, NA))
sum_isna(c(NaN, NA))  # 2 from v0.4.0 (Sep 2020)