weyl (version 0.0-8)

zero: The zero operator

Description

The zero operator maps any function to the zero function (which maps anything to zero). To test for something being zero, use spray::is.zero(); package idiom would be is.zero().

Function zero() takes a single argument which is interpreted as the dimension of the result. So zero(dim(a)) returns a*0 (but is faster).

Usage

zero(d)

Value

A weyl object corresponding to the zero operator (or a Boolean for is.zero())

Arguments

d

Integer specifying dimensionality of the weyl object (twice the spray arity)

Examples

(a <- rweyl(d=5))
is.zero(a)
is.zero(a-a)
is.zero(a*0)

a == a + zero(dim(a))

zero(8)