multmoments: Recursive function to compute a multivariate moment

In symmoments: Symbolic central and noncentral moments of the multivariate normal distribution

Description

Called by callmultmoments to compute representation of a multivariate normal moment using recursive algorithm

Usage

multmoments(moment,current.matrix,current.cell,moment.rep,row_col)

Arguments

moment	vector c(k1,...,kn) specifying the moment X1**k1 *...* Xn**kn
current.matrix	upper-triangular integer matrix under consideration in recursion
current.cell	cell in current matrix under consideration in recursion
moment.rep	current set of representations; mult.moments adds each satisfying matrix to moment.rep
row_col	matrix giving rows and columns for square matrix for each cell

Details

Each row of the representation gives the exponents for a single product of covariance terms. For example, (1,2,0) represents S11**1 S12**2 S22**0, where the Sij are the covariances.

This function would normally only be called by callmultmoments.

Value

moment representation, moment.rep, augmented with additional representations

Author(s)

Kem Phillips <[email protected]>

References

K Phillips, Symbolic Computation of the Central Moments of the Multivariate Normal Distribution, Journal of Statistical Software, 2010.

See Also

callmultmoments (symmoments)

symmoments documentation built on May 29, 2017, 10:29 p.m.