Truncated normal distribution density

Calculates the log density of a univariate truncated normal variable

dtnorm(x, mu, sd, MIN)

Arguments

x	A random variable
mu	The mean parameter of the distribution; NOTE this is not equal to the mean
sd	The standard deviation parameter of the distribution
MIN	Value at which the truncation takes place

Value

Numeric; log density of the distribution, or -1e15 if the x < MIN