tests/testthat/test_00_exGAUS.R

In Stan125/gamlss.dist: Distributions for Generalized Additive Models for Location Scale and Shape

#######################################
#######     gamlss.dist        ########
#######   Distribution tests   ########
#### Exponential Gaussian: exGAUS() ####
#######################################

## Context
testthat::context("exGAUS")

## Seed
set.seed(333)

## Family
fam <- exGAUS()

## Random Values
mu <- 5
sigma <- 1
nu <- 1
rvec <- rexGAUS(1e5, mu, sigma, nu)

## Empirical Moments
ex_emp <- mean(rvec)
vx_emp <- var(rvec)

## Theoretical moments
ex_theo <- fam$mean(mu, sigma, nu)
vx_theo <- fam$variance(mu, sigma, nu)

## Test here
expect_true(abs(ex_emp - ex_theo) < 0.01)
expect_true(abs(vx_emp - vx_theo) < 0.02)