Nothing
context("Model plot methods")
skip_if_offline()
cas <- iNZightTools::smart_read("https://www.stat.auckland.ac.nz/~wild/data/FutureLearn/Census%20at%20School-500.csv")
fit <- lm(height ~ armspan + gender + age + travel, data = cas)
# dev.new()
# dev.set(dev.next())
# plotlm6(fit, which = 6)
test_that("Linear regression model plots - residual vs fitted", {
expect_silent(p <- inzplot(fit, which = "residual"))
expect_is(p, "gg")
expect_match(p$labels$title, "Residuals vs Fitted")
})
test_that("Linear regression model plots - scale-location", {
expect_is(inzplot(fit, which = "scale"), "gg")
})
test_that("Linear regression model plots - residuals vs leverage", {
expect_is(inzplot(fit, which = "leverage"), "gg")
})
test_that("Linear regression model plots - Cook's distance", {
expect_is(inzplot(fit, which = "cooks"), "gg")
})
test_that("Linear regression model plots - Normal Q-Q", {
expect_is(inzplot(fit, which = "normal"), "gg")
})
test_that("Linear regression model plots - Histogram", {
expect_is(inzplot(fit, which = "hist"), "gg")
})
test_that("Linear regression model plots - summary grid", {
expect_is(inzplot(fit), "patchwork")
})
test_that("GLM plots", {
fit_bin <- glm(gender ~ age + height,
data = cas,
family = "binomial")
expect_is(inzplot(fit_bin), "patchwork")
})
test_that("GLM marginal plots", {
skip("car::mms() calls to update(), which doesn't work within testthat")
fit_pois <- glm(cellcost ~ age + height + gender,
data = cas,
family = "poisson")
fit_bin <- glm(gender ~ age + height,
data = cas,
family = "binomial")
expect_null(inzplot(fit_pois, "marginal"))
expect_null(inzplot(fit_bin, "marginal"))
})
test_that("Forest plot", {
inzplot(fit, which = "forest")
})
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