sd_n: Sample Standard Deviation for Numeric Values
In dvmisc: Faster Computation of Common Statistics and Miscellaneous Functions

Description Usage Arguments Value Examples

Written in C++, this function should always run faster than sd for numeric vectors. For integer vectors, sd_i should run even faster.

sd_n(x)

`x`	Numeric vector.

Numeric value.

# In general, sd_n is much faster than sd.
x <- rnorm(1000)
all.equal(sd(x), sd_n(x))
benchmark(sd(x), sd_n(x), replications = 2000) 

# For integer vectors, sd_i should be even faster.
x <- rpois(1000, lambda = 5)
all.equal(sd(x), sd_i(x))
benchmark(sd(x), sd_n(x), sd_i(x), replications = 2000)