test_that("perf.mixo_splsda functions", code = {
data(liver.toxicity)
X <- liver.toxicity$gene
Y <- liver.toxicity$treatment$Dose.Group
set.seed(12)
res <- plsda(X, Y, ncomp = 2)
out <- perf(res, validation = "Mfold", folds = 3, nrepeat = 3)
ground.ncomp <- matrix(c(2,1,2,2,1,2), ncol = 3, byrow=T,
dimnames = list(c("overall", "BER"),
c("max.dist", "centroids.dist", "mahalanobis.dist")))
expect_equal(out$choice.ncomp, ground.ncomp)
})
test_that("does not allow for class with 1 associated sample", code = {
data(liver.toxicity)
X <- liver.toxicity$gene
Y <- liver.toxicity$treatment$Dose.Group
# create a class with one sample only
Y[c(1)] <- 'random.class'
res <- plsda(X, Y, ncomp = 2)
expect_error(perf(res, validation = "Mfold", folds = 3, nrepeat = 3),
"single assocaited")
})
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