https://github.com/cran/bayestestR
Tip revision: d2eac42f58e4e0f0d07298e8c2e719ef6a30672d authored by Dominique Makowski on 19 June 2020, 08:00:07 UTC
version 0.7.0
version 0.7.0
Tip revision: d2eac42
test-weighted_posteriors.R
if (require("BayesFactor", quietly = TRUE)) {
test_that("weighted_posteriors for BayesFactor", {
set.seed(123)
# compute Bayes Factor for 31 different regression models
null_den <- regressionBF(mpg ~ cyl + disp + hp + drat + wt,
data = mtcars, progress = FALSE)
wBF <- weighted_posteriors(null_den)
testthat::expect_is(wBF, "data.frame")
testthat::expect_equal(attr(wBF, "weights")$weights,
c(0, 13, 9, 0, 0, 55, 11, 4, 4, 1246, 6, 2, 38, 4, 946, 12, 3,
3, 209, 3, 491, 174, 4, 134, 7, 293, 1, 123, 35, 92, 51, 27))
})
test_that("weighted_posteriors for BayesFactor (intercept)", {
set.seed(123)
# fails for win old-release
testthat::skip_on_cran()
testthat::skip_on_ci()
dat <- data.frame(x1 = rnorm(10),
x2 = rnorm(10),
y = rnorm(10))
BFmods <- regressionBF(y ~ x1 + x2, data = dat, progress = FALSE)
res <- weighted_posteriors(BFmods)
testthat::expect_equal(attr(res,"weights")$weights,c(1032, 805, 1388, 775))
wHDI <- hdi(res[c("x1","x2")], ci = 0.9)
testthat::expect_equal(wHDI$CI_low, c(-0.519, -0.640), tol = 1e-3)
testthat::expect_equal(wHDI$CI_high, c(0.150, 0.059), tol = 1e-3)
})
test_that("weighted_posteriors for nonlinear BayesFactor", {
set.seed(123)
data(sleep)
BFS <- ttestBF(x = sleep$extra[sleep$group == 1],
y = sleep$extra[sleep$group == 2],
nullInterval = c(-Inf,0),
paired = TRUE)
res <- weighted_posteriors(BFS)
testthat::expect_equal(attributes(res)$weights$weights, c(113, 3876, 11))
})
}
if (require("brms", quietly = TRUE)) {
test_that("weighted_posteriors vs posterior_average", {
testthat::skip_on_cran()
testthat::skip_on_travis()
fit1 <- brm(rating ~ treat + period + carry,
data = inhaler,
refresh = 0,
save_all_pars = TRUE)
fit2 <- brm(rating ~ period + carry,
data = inhaler,
refresh = 0,
save_all_pars = TRUE)
set.seed(444)
res_BT <- weighted_posteriors(fit1, fit2)
set.seed(444)
res_brms <- brms::posterior_average(fit1, fit2, weights = "bma", missing = 0)
res_brms <- res_brms[, 1:4]
res_BT1 <- eti(res_BT)
res_brms1 <- eti(res_brms)
testthat::expect_equal(res_BT1$Parameter, res_brms1$Parameter)
testthat::expect_equal(res_BT1$CI, res_brms1$CI)
testthat::expect_equal(res_BT1$CI_low, res_brms1$CI_low)
testthat::expect_equal(res_BT1$CI_high, res_brms1$CI_high)
# plot(res_brms1)
# plot(res_BT1)
})
}