# Exits
if (!requireNamespace("mlr3", quietly = TRUE)) {
exit_file("Package mlr3 missing")
}
if (!requireNamespace("mlr3learners", quietly = TRUE)) {
exit_file("Package mlr3learners missing")
}
if (!requireNamespace("ranger", quietly = TRUE)) {
exit_file("Package ranger missing")
}
# Load required packages
suppressMessages({
library(mlr3)
library(mlr3learners)
library(ranger)
})
# Generate Friedman benchmark data
friedman1 <- gen_friedman(seed = 101)
# Fit model(s)
set.seed(101)
task <- TaskRegr$new("friedman", backend = friedman1, target = "y")
lrnr <- lrn("regr.ranger", importance = "impurity")
expect_error(vi(lrnr)) # did not call `$traini()` yet
expect_error(vi_model(lrnr)) # did not call `$traini()` yet
lrnr$train(task) # `vi()`, etc. should now work
# Compute model-based VI scores
vis <- vi_model(lrnr)
# Expect `vi()` and `vi_model()` to both work
expect_identical(
current = vi(lrnr, sort = FALSE),
target = vi_model(lrnr)
)
# Expectations for `vi_model()`
expect_identical(
current = vis$Importance,
target = unname(lrnr$model$variable.importance)
)
# Expectations for `get_feature_names()`
expect_identical(
current = sort(vip:::get_feature_names.Learner(lrnr)),
target = sort(paste0("x", 1L:10L))
)
# Call `vip::vip()` directly
p <- vip(lrnr, method = "model", include_type = TRUE)
# Expect `p` to be a `"gg" "ggplot"` object
expect_identical(
current = class(p),
target = c("gg", "ggplot")
)
# Display VIPs side by side
grid.arrange(
vip(vis, include_type = TRUE),
p,
nrow = 1
)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.