Get NA values between non-NA values

Check if a vector of values has any NAs between at least two non-NA values. If so, it will return a vector of indices of NA values for which this is the case. If none are found, it will return NULL.

Usage

get_na_between_non_na(x)

Arguments

x

A vector of values.

Value

A vector of numeric indices of NA values that are between at least two non-NA values. Returns an NULL if none are found.

Details

This can e.g. conveniently be used to test whether there are any BLQ samples in-between two numeric (above LOQ) values. Within a single PK curve this is not likely to occur and the individual or data point should be flagged as an outlier.

Examples

get_na_between_non_na(c(NA, 1, 2, NA, 4, NA, 6, NA, NA, 9, NA))
#> [1] 4 6 8 9