normcdf: Normal distribution

In lava: Latent Variable Models

Normal distribution

Description

Density (normpdf), distribution function (normcdf), and quantile function (norminv) of the normal distribution for objects of class estimate (see estimate.default) in which case the delta method is applied to obtain the influence function (and hence robust standard errors) of the transformed parameter.

Usage

normcdf(q, mean = 0, sd = 1, ...)

## Default S3 method:
normcdf(q, mean = 0, sd = 1, lower.tail = TRUE, log.p = FALSE, ...)

normpdf(x, mean = 0, sd = 1, ...)

## Default S3 method:
normpdf(x, mean = 0, sd = 1, log = FALSE, ...)

norminv(p, mean = 0, sd = 1, ...)

## Default S3 method:
norminv(p, mean = 0, sd = 1, lower.tail = TRUE, log.p = FALSE, ...)

Arguments

mean	mean of the normal distribution (numeric or estimate object)
sd	standard deviation of the normal distribution (numeric or estimate object)
...	additional arguments to lower level functions (e.g., labels)
lower.tail	if TRUE (default) probabilities are P(X\leq x), otherwise P(X > x)
x, q	vector of quantiles, or an estimate object
log, log.p	if TRUE probabilities/densities are given as \log(p)
p	vector of probabilities, or an estimate object

Details

Any of the arguments x/q/p, mean and sd may be an estimate object. When more than one of them is an estimate object the objects are first merged (see merge.estimate) and the joint delta method is applied, correctly propagating the dependence between them.

Value

A numeric vector (default method) or an object of class estimate.

Author(s)

Klaus Kähler Holst

See Also

estimate.default stats::dnorm

Examples

e <- estimate(coef = c(a = 1, b = 2), vcov = diag(2) * 0.1)
normcdf(e)
normpdf(e)
norminv(normcdf(e)) # identity

## mean and sd may themselves be estimates
mu <- estimate(coef = c(mu = 0.5), vcov = 0.01)
normcdf(e, mean = mu, sd = 2)

lava documentation built on Oct. 23, 2026, 1:09 a.m.