# NOT RUN {
## The function is currently defined as
function(n, distr = NULL, mu = NULL, sigma = NULL) {
if (is.null(distr)) {
stop("Argument \"distr\" should be defined numeric with possible values 1,2,3,4 or 5")
}
else if (distr == 1) {
a <- ifelse(is.null(mu), 0, mu)
b <- ifelse(is.null(sigma), 1, sigma)
rk <- rnorm(n, mean = a, sd = b)
}
else if (distr == 2) {
a <- ifelse(is.null(mu), 0, mu)
b <- ifelse(is.null(sigma), 1 / sqrt(2), sigma / sqrt(2))
rk <- a + b * sample(c(-1, +1), size = n, replace = TRUE) *
rexp(n)
}
else if (distr == 3) {
a <- ifelse(is.null(mu), exp(1 / 2), log(mu / sqrt(1 + (sigma / mu)^2)))
b <- ifelse(is.null(sigma), exp(1) * (exp(1) - 1), sqrt(log(1 +
(sigma / y)^2)))
rk <- rlnorm(n, meanlog = a, sdlog = b)
}
else if (distr == 4) {
a <- ifelse(is.null(mu), 1, mu^2 / sigma^2)
b <- ifelse(is.null(sigma), 1, mu / sigma^2)
rk <- rgamma(n, shape = a, rate = b)
}
else if (distr == 5) {
a <- ifelse(is.null(mu), 0.5, (1 - mu) * (mu / sigma)^2 -
mu)
b <- ifelse(is.null(sigma), 1 / sqrt(12), (mu * (1 - mu) / sigma^2 -
1) * (1 - mu))
if (any(c(a, b) <= 0)) {
stop(paste(
"\nNegative Beta parameters:\n a =", a,
";\t b =", b
))
}
rk <- rbeta(n, shape1 = a, shape2 = b)
}
else {
stop("Argument \"distr\" should be defined numeric with possible values 1,2,3,4 or 5")
}
return(rk)
}
# }
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