vtn function

Truncated Normal Distribution Variance

Calculate variance of Truncated Normal distributions

vtn(.mean = rep(0, 1), .sd = rep(1, length(.mean)), .low = rep(-Inf,
  length(.mean)), .high = rep(Inf, length(.mean)), .checks = TRUE)

Arguments

• .mean: Length K vector with the means of the K Normal distributions prior to truncation
• .sd: Length K vector with the standard deviations of the K Normal distributions prior to truncation
• .low: Length K vector with the lower truncation bound of the K Normal distributions prior to truncation
• .high: Length K vector with the upper truncation bound of the K Normal distributions prior to truncation
• .checks: Length 1 logical vector indicating whether to perform checks (safer) or not (faster) on the input parameters

Returns

A length K vector of expectations corresponding to the Truncated Normal distributions. NAs are returned (with a warning) for invalid. parameter values.

Details

The special values of -Inf and Inf are valid values in the .low and .high arguments, respectively.

Examples

vtn() ## 1
vtn(0, 1, -Inf, Inf) ## 1
vtn(0, 1, -9999, 9999) ## 1

vtn(0, 1, 0, Inf) ## 0.36338

vtn(0, 1, Inf, -Inf) ## NA with warning

vtn(c(0, 0),
    c(1, 1),
    c(-Inf, 5),
    c(1, Inf)
    ) ## multiple variances

Author(s)

Jonathan Olmsted