lndIChisq: Compute Log of Inverted Chi-Squared Density

In bayesm: Bayesian Inference for Marketing/Micro-Econometrics

Compute Log of Inverted Chi-Squared Density

Description

lndIChisq computes the log of an Inverted Chi-Squared Density.

Usage

lndIChisq(nu, ssq, X)

Arguments

nu	d.f. parameter
ssq	scale parameter
X	ordinate for density evaluation (this must be a matrix)

Details

Z = nu*ssq / \chi^2_{nu} with Z \sim Inverted Chi-Squared.
lndIChisq computes the complete log-density, including normalizing constants.

Value

Log density value

Warning

This routine is a utility routine that does not check the input arguments for proper dimensions and type.

Author(s)

Peter Rossi, Anderson School, UCLA, [e-mail].

References

For further discussion, see Chapter 2, Bayesian Statistics and Marketing by Rossi, Allenby, and McCulloch.

See Also

dchisq

Examples

lndIChisq(3, 1, matrix(2))

bayesm documentation built on Sept. 24, 2023, 1:07 a.m.