Nothing
funs <- c(mse, rmse, mae, medae, mape)
test_that("mse is the same as rmse squared", {
y <- 1:10
pred <- 10:1
w <- 1:10
expect_equal(mse(y, pred, w), rmse(y, pred, w)^2)
})
test_that("mape does not allow 0 actuals", {
y <- 0:2
pred <- 2 * y
expect_error(mape(y, pred))
})
test_that("weight 1 gives same as unweighted", {
y <- 1:5
pred <- c(2, 1, 3, 2, 4)
w <- rep(1, length(y))
for (f in funs)
expect_equal(f(y, pred, w), f(y, pred))
})
test_that("weight 2 gives same as weight 1", {
y <- 1:5
pred <- c(2, 1, 3, 2, 4)
w1 <- rep(1, length(y))
w2 <- rep(2, length(y))
for (f in funs)
expect_equal(f(y, pred, w1), f(y, pred, w2))
})
test_that("varying weights is different from unweighted", {
y <- 1:15
pred <- sqrt(2:16)
w <- 1:15
for (f in funs)
expect_false(f(y, pred, w) == f(y, pred))
})
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.