dateutils (version 0.1.5)

sd_na: Return the standard deviation

Description

Return the standard deviation of `x`. If no observations, return `NA`. This is a workaround for the fact that in data.table, `:= sd(x, na.rm = TRUE)` will return `NaN` where there are no observations

Usage

sd_na(x)

Arguments

x

data potentially with non-finite values

Value

Standard deviation of the input

Examples

# NOT RUN {
sd_na(c(1,2,3,NA)) ## 1
# }