Nothing

```
context("cvTool - repeated CV")
## load packages
library("cvTools", quietly=TRUE)
## set seed for reproducibility
set.seed(1234)
## generate data for tests
n <- 20
x <- rnorm(n)
y <- x + rnorm(n)
x <- as.matrix(x)
xy <- data.frame(x, y)
## set up function call to lm() and lts()
lmCall <- call("lm", y~x)
ltsCall <- call("ltsReg", alpha=0.75)
## set up cross-validation folds
K <- 5
R <- 2
folds <- cvFolds(n, K, R)
## run tests
test_that("matrix of results has correct dimensions", {
## LS fit
lmCV <- cvTool(lmCall, data=xy, y=xy$y, cost=rmspe, folds=folds)
expect_is(lmCV, "matrix")
expect_equal(dim(lmCV), c(R, 1))
## reweighted and raw LTS fits
ltsCV <- cvTool(ltsCall, x=x, y=y, cost=rtmspe, folds=folds,
predictArgs=list(fit="both"))
expect_is(ltsCV, "matrix")
expect_equal(dim(ltsCV), c(R, 2))
})
test_that("repeated CV ignores standard errors and returns matrix", {
## LS fit
lmCV <- cvTool(lmCall, data=xy, y=xy$y, cost=rmspe, folds=folds,
costArgs=list(includeSE=TRUE))
expect_is(lmCV, "matrix")
expect_equal(dim(lmCV), c(R, 1))
## reweighted and raw LTS fits
ltsCV <- cvTool(ltsCall, x=x, y=y, cost=rtmspe, folds=folds,
predictArgs=list(fit="both"), costArgs=list(includeSE=TRUE))
expect_is(ltsCV, "matrix")
expect_equal(dim(ltsCV), c(R, 2))
})
```

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