extrunc {truncdist}

Expected value of a truncated random variable

Description

This function computes the expected value of a truncated random variable using numerical integration.

Usage

extrunc(spec, a = -Inf, b = Inf, ...)

Arguments

spec

a character value that specifies the underlying probability distribution

a

a numeric value for the lower bound of the random variable

b

a numeric value for the upper bound of the random variable

...

other arguments are are passed to the corresponding quantile function

Details

Numerical integration of the truncated density function is performed to compute the expected value.

Value

A numerical value for the expectation.

Author(s)

Frederick Novomestky [e-mail]

Saralees Nadarajah [e-mail]

References

Nadarajah, S. and S. Kotz, 2006. R Programs for Computing Truncated Distributions, Journal of Statistical Software, 16, August 2006, http://www.jstatsoft.org/v16/c02

See Also

dtrunc

Examples

mu <- extrunc( spec="norm",a=1, b=2 )