sdPop: Population standard deviation

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About

This package has a only one function, sd.population(), which allows you to calculate the standard deviation from a population. This means it is divided by n, not n-1.

Install

You can install this package using remotes:

install.packages('remotes')
library(remotes)
remotes::install_github('itsmiguelrojas/sdPop')

Or you can do the same with devtools:

install.packages('devtools')
library(devtools)
devtools::install_github('itsmiguelrojas/sdPop')

Parameters

sd.population() has only two parameters:

• x: Data passed as a numeric vector.
• na.rm: Missing values? Remove them. Defaults to FALSE.

Example

Simple calculation

x <- c(3.6, 3.0, 6.8, 7.5, 6.3, 5.7, 7.7, 2.8, 2.6, 8.6)
sd.population(x)

This produces:

[1] 2.15323

Missing values

x <- c(3.6, 3.0, 6.8, NA, 6.3, 5.7, 7.7, NA, 2.6, 8.6)
sd.population(x)

It gives the following error:

Error in sd.population(x) : NA's detected

If we add na.rm = TRUE:

sd.population(x, na.rm = TRUE)

[1] 2.094002