Nothing
################################################################################
context("RANDOM_SVD")
set.seed(SEED)
################################################################################
TOL <- 1e-4
# function for sampling scaling
sampleScale <- function() {
tmp <- sample(list(c(TRUE, FALSE),
c(TRUE, TRUE),
c(FALSE, FALSE)))[[1]]
list(center = tmp[1], scale = tmp[2])
}
# Simulating some data
N <- 73
M <- 43
x <- matrix(rnorm(N * M, mean = 100, sd = 5), N)
################################################################################
test_that("equality with prcomp", {
for (t in TEST.TYPES) {
X <- `if`(t == "raw", asFBMcode(x), big_copy(x, type = t))
k <- sample(c(2, 5, 20), 1) # 2, 5 or 20
test <- big_randomSVD(X, k = k, tol = 1e-10, ncores = test_cores())
pca <- prcomp(X[], center = FALSE, scale. = FALSE)
expect_equal(diffPCs(predict(test), pca$x), 0, tolerance = TOL)
expect_equal(diffPCs(test$v, pca$rotation), 0, tolerance = TOL)
sc <- sampleScale()
test <- big_randomSVD(X, k = k, tol = 1e-10, ncores = test_cores(),
fun.scaling = big_scale(center = sc$center,
scale = sc$scale))
pca <- prcomp(X[], center = sc$center, scale. = sc$scale)
expect_equal(diffPCs(predict(test), pca$x), 0, tolerance = TOL)
expect_equal(diffPCs(test$v, pca$rotation), 0, tolerance = TOL)
if (sc$center) expect_equal(test$center, pca$center)
if (sc$scale) expect_equal(test$scale, pca$scale)
p <- plot(test, type = sample(c("screeplot", "scores", "loadings"), 1))
expect_s3_class(p, "ggplot")
expect_error(predict(test, abc = 2), "Argument 'abc' not used.")
expect_error(plot(test, abc = 2), "Argument 'abc' not used.")
}
})
################################################################################
test_that("equality with prcomp with half of the data", {
ind <- sample(N, N / 2)
ind2 <- setdiff(1:N, ind)
for (t in TEST.TYPES) {
X <- `if`(t == "raw", asFBMcode(x), big_copy(x, type = t))
k <- sample(c(2, 5, 20), 1) # 2, 5 or 20
sc <- sampleScale()
test <- big_randomSVD(X, ncores = test_cores(),
ind.row = ind, k = k, tol = 1e-10,
fun.scaling = big_scale(center = sc$center,
scale = sc$scale))
pca <- prcomp(X[ind, ], center = sc$center, scale. = sc$scale)
expect_equal(diffPCs(predict(test), pca$x), 0, tolerance = TOL)
expect_equal(diffPCs(test$v, pca$rotation), 0, tolerance = TOL)
if (sc$center) expect_equal(test$center, pca$center)
if (sc$scale) expect_equal(test$scale, pca$scale)
expect_equal(diffPCs(predict(test, X, ind.row = ind2),
predict(pca, X[ind2, ])), 0, tolerance = TOL)
p <- plot(test, type = sample(c("screeplot", "scores", "loadings"), 1))
expect_s3_class(p, "ggplot")
}
})
################################################################################
test_that("equality with prcomp with half of half of the data", {
ind <- sample(N, N / 2)
ind2 <- setdiff(1:N, ind)
ind.col <- sample(M, M / 2)
for (t in TEST.TYPES) {
X <- `if`(t == "raw", asFBMcode(x), big_copy(x, type = t))
k <- sample(c(2, 5, 20), 1) # 2, 5 or 20
sc <- sampleScale()
test <- big_randomSVD(X, ind.row = ind, ind.col = ind.col,
k = k, tol = 1e-10, ncores = test_cores(),
fun.scaling = big_scale(center = sc$center,
scale = sc$scale))
pca <- prcomp(X[ind, ind.col], center = sc$center, scale. = sc$scale)
expect_equal(diffPCs(predict(test), pca$x), 0, tolerance = TOL)
expect_equal(diffPCs(test$v, pca$rotation), 0, tolerance = TOL)
if (sc$center) expect_equal(test$center, pca$center)
if (sc$scale) expect_equal(test$scale, pca$scale)
expect_equal(diffPCs(predict(test, X, ind.row = ind2, ind.col = ind.col),
predict(pca, X[ind2, ind.col])), 0, tolerance = TOL)
p <- plot(test, type = sample(c("screeplot", "scores", "loadings"), 1))
expect_s3_class(p, "ggplot")
}
})
################################################################################
test_that("as_scaling_fun() works", {
df0 <- data.frame(center = 1:6, scale = 2:7)
fun.scaling <- as_scaling_fun(df0$center, df0$scale)
expect_identical(fun.scaling(NULL, NULL, 1:3), df0[1:3, ])
fun.scaling2 <- as_scaling_fun(1:6, 2:7, ind.col = 6:1)
expect_identical(fun.scaling2(NULL, NULL, 1:3), df0[6:4, ])
X <- big_attachExtdata()
sc <- big_scale()(X)
fun <- as_scaling_fun(center = sc$center, scale = sc$scale)
obj.svd <- big_randomSVD(X, fun.scaling = fun, ncores = test_cores())
obj.svd2 <- big_randomSVD(X, fun.scaling = big_scale(), ncores = test_cores())
expect_equal(obj.svd, obj.svd2)
})
################################################################################
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