Nothing
set.seed(1234)
x <- rgev(1000, xi = .2, mu = 0, sigma = 1)
g <- evm(x, family = gev)
set.seed(4321)
cg <- cv(g, range = seq(.1, 64, length.out = 25))
## Parameter estimates shrink with increasing penalty
expect_true(all(diff(cg$cv$estimate) < 0))
set.seed(4321)
cvL1 <- cv(g, range = seq(.1, 64, length.out = 25), penalty = "lasso")
## Specifying penalty = 'lasso' gives different output
expect_true(all(cg$cv$estimate != cvL1$cv$estimatae))
x <- rgev(50, xi = .2, mu = 0, sigma = 1)
g50 <- evm(x, family = gev)
g50num <-
cg50 <- cv(g50, range = seq(.1, 64, length.out = 25), folds = 5)
expect_equal(range(cg50$data$fold), c(1, 5),
label = "Specifying number of cv folds passes through")
cg50all <- cv(g50, range = seq(.1, 10, length.out = 25), folds = 50)
cg50all_2 <- cv(g50, range = seq(.1, 10, length.out = 25), folds = 50)
expect_equal(cg50all$cv, cg50all_2$cv,
label = "Leave-one-out CV produces the same results from one run to another")
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