Nothing
context("mahalanobis_distance")
set.seed(123)
x <- data.frame(C1 = rnorm(100), C2 = rnorm(100), C3 = rnorm(100))
test_that("mahalanobis_distance output has correct dimensions", {
expect_equal(x %>% dplyr::mutate(MD = mahalanobis_distance(x)) %>% dim(), c(100, 4))
expect_true(x %>% dplyr::mutate(MD = mahalanobis_distance(x)) %>% is.data.frame())
expect_equal(x %>% mahalanobis_distance(output = "bd") %>% dim(), c(100, 3))
expect_true(x %>% mahalanobis_distance(output = "bd") %>% is.matrix())
expect_equal(x %>% mahalanobis_distance(output = "both") %>% dim(), c(100, 4))
expect_true(x %>% mahalanobis_distance(output = "both") %>% is.matrix())
})
test_that("mahalanobis_distance computes correctly", {
expect_equal(x %>% mahalanobis_distance() %>% .[1] %>% round(2), 5.48)
expect_equal(x %>% mahalanobis_distance(output = "bd") %>% .[1, 1] %>% round(2) %>% .[[1]], 0.71)
expect_equal(x %>% mahalanobis_distance(output = "bd", normalize = TRUE) %>% .[1, 1] %>% round(2) %>% .[[1]], 0.08)
})
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