tests/testthat/test-sdistribution-ChiSquaredNoncentral.R

In alan-turing-institute/distr6: The Complete R6 Probability Distributions Interface

skip_if_distr_not_installed(ChiSquaredNoncentral)

test_that("autotest", {
  autotest_sdistribution(
    sdist = ChiSquaredNoncentral,
    pars = list(df = 8, location = 2),
    traits = list(
      valueSupport = "continuous",
      variateForm = "univariate",
      type = PosReals$new(zero = TRUE)
    ),
    support = PosReals$new(zero = TRUE),
    symmetry = "asymmetric",
    mean = 10,
    median = 9.2271,
    variance = 24,
    skewness = 0.9526,
    exkur = 1.3333,
    mgf = NaN,
    cf = 0.0021 - 0.0179i,
    pdf = dchisq(1:3, 8, 2),
    cdf = pchisq(1:3, 8, 2),
    quantile = qchisq(c(0.24, 0.42, 0.5), 8, 2)
  )
})

test_that("manual", {
  expect_equal(ChiSquaredNoncentral$new(df = 1, location = 1)$mgf(0.1), exp(0.1 / 0.8) / (0.8^0.5))
})