Description Usage Arguments Details Value Author(s) References See Also Examples
Converts an multipol object to a simple list representing a multivariate polynomial or a simple list to an multipol object
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poly |
a multipol object or a list giving powers and coefficients defining the polynomial |
The list representation consists of 2 components: 'powers' is a matrix with each row representing the powers of X in one term of the multivariate polynomial. 'coeff' is a vector with each element being the coefficient of the corresponding term in powers
if poly is of class 'multipol', it is a list with two components described below. If poly is such a list, the value is the corresponding multipol object
Kem Phillips <kemphillips@comcast.net>
K Phillips, Symbolic Computation of the Central Moments of the Multivariate Normal Distribution, Journal of Statistical Software, 2010.
convert.multipol, evaluate.expected.polynomial, integrate.polynomial
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | # create an mpoly object to work with (requires library mpoly) (not run)
# t0 <- mpoly::mpoly(list(c(coef=3,x1=2),c(coef=2,x1=1,x2=3),
# c(coef=-4,z=2),c(coef=1,x1=1,x2=2,z=1)))
# convert from mpoly to list representation (not run)
# t1 <- convert.mpoly(t0)
# convert from list representation to a multipol object(not run)
# t2 <- convert.multipol(t1)
# convert back to a list representation (not run)
# t3 <- convert.multipol(t2)
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