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library("matrixStats")
x <- matrix(1:27, ncol = 3)
# To check names attribute
dimnames <- list(letters[1:9], LETTERS[1:3])
rowCollapse_R <- function(x, idxs, ..., useNames = TRUE) {
res <- x[, idxs]
# Preserve names attribute?
if (!useNames) names(res) <- NULL
res
}
idxs <- 1L
# Test with and without dimnames on x
for (setDimnames in c(TRUE, FALSE)) {
if (setDimnames) dimnames(x) <- dimnames
else dimnames(x) <- NULL
# Check names attribute
for (useNames in c(TRUE, FALSE)) {
y_truth <- rowCollapse_R(x, idxs, useNames = useNames)
y <- rowCollapse(x, idxs, useNames = useNames)
stopifnot(identical(y, y_truth))
y2 <- colCollapse(t(x), idxs, useNames = useNames)
stopifnot(identical(y2, y))
}
}
idxs <- 2L
# Test with and without dimnames on x
for (setDimnames in c(TRUE, FALSE)) {
if (setDimnames) dimnames(x) <- dimnames
else dimnames(x) <- NULL
# Check names attribute
for (useNames in c(TRUE, FALSE)) {
y_truth <- rowCollapse_R(x, idxs, useNames = useNames)
y <- rowCollapse(x, idxs, useNames = useNames)
stopifnot(identical(y, y_truth))
y2 <- colCollapse(t(x), idxs, useNames = useNames)
stopifnot(identical(y2, y))
}
}
rowCollapse_R <- function(x, idxs, ..., useNames = TRUE) {
res <- c(x[1:5, 1], x[6:9, 3])
# Preserve names attribute?
if (!useNames) names(res) <- NULL
res
}
idxs <- c(1, 1, 1, 1, 1, 3, 3, 3, 3)
# Test with and without dimnames on x
for (setDimnames in c(TRUE, FALSE)) {
if (setDimnames) dimnames(x) <- dimnames
else dimnames(x) <- NULL
# Check names attribute
for (useNames in c(TRUE, FALSE)) {
y_truth <- rowCollapse_R(x, idxs, useNames = useNames)
y <- rowCollapse(x, idxs, useNames = useNames)
stopifnot(identical(y, y_truth))
y2 <- colCollapse(t(x), idxs, useNames = useNames)
stopifnot(identical(y2, y))
}
}
rowCollapse_R <- function(x, idxs, ..., useNames = TRUE) {
res <- c(x[1, 1], x[2, 2], x[3, 3], x[4, 1], x[5, 2],
x[6, 3], x[7, 1], x[8, 2], x[9, 3])
# Preserve names attribute?
if (useNames) {
names <- rownames(x)
if (!is.null(names)) names(res) <- names
}
res
}
idxs <- 1:3
# Test with and without dimnames on x
for (setDimnames in c(TRUE, FALSE)) {
if (setDimnames) dimnames(x) <- dimnames
else dimnames(x) <- NULL
# Check names attribute
for (useNames in c(TRUE, FALSE)) {
y_truth <- rowCollapse_R(x, idxs, useNames = useNames)
y <- rowCollapse(x, idxs, useNames = useNames)
stopifnot(identical(y, y_truth))
y2 <- colCollapse(t(x), idxs, useNames = useNames)
stopifnot(identical(y2, y))
}
}
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