Nothing
intpartial.exp.a <- function(x, lambda) {
eval(D(expression(
lambda * exp(- lambda * x)), "lambda"))
}
intpartial.lnorm.a <- function(x, mu, sigma) {
eval(D(expression(
1 / (sqrt(2 * pi) * sigma * x) * exp(-(log(x) - mu) ^ 2 / (2 * sigma ^ 2))),
"mu"))
}
intpartial.lnorm.b <- function(x, mu, sigma) {
eval(D(expression(
1 / (sqrt(2 * pi) * sigma * x) * exp(-(log(x) - mu) ^ 2 / (2 * sigma ^ 2))),
"sigma"))
}
intpartial.weibull.a <- function(x, a, b) {
eval(D(expression(
(a / b) * (x / b) ^ (a - 1) * exp(-(x / b) ^ a)), "a"))
}
intpartial.weibull.b <- function(x, a, b) {
eval(D(expression(
(a / b) * (x / b) ^ (a - 1) * exp(-(x / b) ^ a)), "b"))
}
intpartial.gamma.a <- function(x, a, r){
#a=shape
#r=rate the default output of pgamma is rate.
eval(D(expression(
x ^ (a - 1) * exp(-x * r) * r ^ (a) / gamma(a)), "a"))
}
intpartial.gamma.b <- function(x, a, r) {
#a=shape
#r=rate the default output of pgamma is rate.
eval(D(expression(
x ^ (a - 1) * exp(-x * r) * r ^ (a) / gamma(a)), "r"))
}
intpartial.norm.a <- function(x, mu, sigma) {
eval(D(expression(
1 / (sqrt(2 * pi) * sigma) * exp(-(x - mu) ^ 2 / (2 * sigma ^ 2))),
"mu"))
}
intpartial.norm.b <- function(x, mu, sigma) {
eval(D(expression(
1 / (sqrt(2 * pi) * sigma) * exp(-(x - mu) ^ 2 / (2 * sigma ^ 2))),
"sigma"))
}
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