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26 changes: 22 additions & 4 deletions R/statistical_tests_and_estimates.R
Original file line number Diff line number Diff line change
Expand Up @@ -461,14 +461,32 @@ binom_ci <- function(x,
methods = 'wilson',
...){

.check_response_input(x)
.check_numeric_input(conf.level, lower_bound = 0, upper_bound = 1 - 1E-12,
scalar = TRUE, whole_num = FALSE, allow_NA = FALSE)

x <- stats::na.omit(x)
# Check input type/length (errors for empty or wrong type)
# but handle all-NA case with warning instead of error
if (length(dim(x)) > 1) stop('"x" must be a vector (one-dimensional object)')
if (length(x) == 0) stop('"x" length must be > 0')

x_nona <- x[!is.na(x)]

if (!is.logical(x) & length(x_nona) > 0 & !all(x_nona %in% c(0, 1)))
stop('"x" must be a numeric vector containing only 0/1 values or a logical vector containing only T/F values')

if (length(x_nona) == 0) {
warning('"x" has no non-NA values. Returning NA results.')
na_result <- binom::binom.confint(x = 0, n = 0,
conf.level = conf.level,
methods = methods)
na_result$mean <- NA_real_
na_result$lower <- NA_real_
na_result$upper <- NA_real_
return(na_result)
}

npos <- sum(x);
n <- length(x);
npos <- sum(x_nona);
n <- length(x_nona);

binom::binom.confint(x = npos,
n = n,
Expand Down
10 changes: 8 additions & 2 deletions tests/testthat/test_statistical_tests_and_estimates.R
Original file line number Diff line number Diff line change
Expand Up @@ -493,14 +493,20 @@ test_that("test-wilson_ci", {
test_that("test-binom_ci", {

# check x
expect_error(binom_ci(c(NA, NA, NA)), '"x" must have at least one non-NA value')
expect_error(binom_ci(c()), '"x" length must be > 0')
expect_error(binom_ci(c(NA, NA, NA)), '"x" must have at least one non-NA value')
expect_error(binom_ci(x = c("F", "T", "F", "T")),
'"x" must be a numeric vector containing only 0/1 values or a logical vector containing only T/F values')
expect_error(binom_ci(x = factor(c("F", "T", "F", "T"))),
'"x" must be a numeric vector containing only 0/1 values or a logical vector containing only T/F values')

# all-NA input should warn and return NAs (issue #105)
expect_warning(result <- binom_ci(c(NA, NA, NA)), 'no non-NA values')
expect_true(all(is.na(result$mean)))
expect_true(all(is.na(result$lower)))
expect_true(all(is.na(result$upper)))
expect_equal(result$x, 0)
expect_equal(result$n, 0)

# binom_ci() should match binom::binom.confint()
x <- c(1, 1, 1, 0, 0)
expect_equal(binom_ci(x), binom::binom.wilson(3, 5))
Expand Down
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