mvp (version 1.0-8)

constant: The constant term

Description

Get and set the constant term of an mvp object

Usage

# S3 method for mvp
constant(x)
# S3 method for mvp
constant(x) <- value
# S3 method for numeric
constant(x)
is.constant(x)

Arguments

x

Object of class mvp

value

Scalar value for the constant

Details

The constant term in a polynomial is the coefficient of the empty term. In an mvp object, the map {} -> c, implies that c is the constant.

If x is an mvp object, constant(x) returns the value of the constant in the multivariate polynomial; if x is numeric, it returns a constant multivariate polynomial with value x.

Function is.constant() returns TRUE if its argument has no variables and FALSE otherwise.

Examples

# NOT RUN {
a <- rmvp(5)+4
constant(a)
constant(a) <- 33
a

constant(0)  # the zero mvp
# }