/usr/share/doc/r-cran-matrixstats/tests/binCounts.R is in r-cran-matrixstats 0.52.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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library("stats")
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# Local functions
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binCounts_hist <- function(x, bx, right = FALSE, ...) {
n0 <- graphics::hist(x, breaks = bx, right = right,
include.lowest = TRUE, plot = FALSE)$counts
}
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# Non-sorted and sorted positions
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nx <- 1e5 # Number of data points
nb <- 2e3 # Number of bins
# Uniformely distributed bins
bx <- seq(from = 0, to = 1, length.out = nb + 1L)
bx <- c(-1, bx, 2)
# Sample data points
set.seed(0xBEEF)
x <- runif(nx, min = 0, max = 1)
for (kk in 1:2) {
n0 <- binCounts_hist(x, bx = bx)
n1 <- binCounts(x, bx = bx)
# Sanity check
stopifnot(identical(n1, n0))
# Check reversed
n1r <- rev(binCounts(-x, bx = rev(-bx), right = TRUE))
stopifnot(identical(n1r, n1))
# Retry with a sorted vector
x <- sort(x)
} # for (kk in 1:2)
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# Missing values
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x <- 1:200
x[100] <- NA_integer_
nx <- length(x)
# Bins
bx <- c(0.5, 50.5, 100.5, 150.5, 200.5)
y_smooth0 <- binCounts_hist(x, bx = bx)
y_smooth <- binCounts(x, bx = bx)
# Sanity check
stopifnot(all.equal(y_smooth, y_smooth0))
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# Border cases
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x <- 1:10
bx <- min(x) - c(10, 1)
y_smooth <- binCounts(x, bx = bx)
stopifnot(all.equal(y_smooth, 0L))
bx <- range(x)
y_smooth <- binCounts(x, bx = bx)
stopifnot(all.equal(y_smooth, length(x) - 1L))
bx <- max(x) + c(1, 10)
y_smooth <- binCounts(x, bx = bx)
stopifnot(all.equal(y_smooth, 0L))
# Every second empty
x <- 1:10
bx <- rep(x, each = 2L)
y_smooth <- binCounts(x, bx = bx)
stopifnot(all.equal(y_smooth, rep(c(0L, 1L), length.out = length(bx) - 1L)))
## NOTE: binCounts_hist() does not give the same last bin count
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# Exception handling
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# Zero bin bounderies (invalid bin definition)
bx <- double(0L)
res <- try(y_smooth <- binCounts(1:10, bx = bx), silent = TRUE)
stopifnot(inherits(res, "try-error"))
# One bin boundery (invalid bin definition)
bx <- double(1L)
res <- try(y_smooth <- binCounts(1:10, bx = bx), silent = TRUE)
stopifnot(inherits(res, "try-error"))
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