zero

0th

Percentile

The zero polynomial

Test for the zero, or empty, polynomial

Keywords
datasets
Usage
zero(d)
is.zero(L)
is.empty(L)
Arguments
L

A two-element list of indices and values, possibly a spray object

d

Integer specifying dimensionality of the spray (the arity)

Details

Functions is.empty() and is.zero() are synonyms. If spray objects are interpreted as multivariate polynomials, “is.zero()” is more intuitive, if sprays are interpreted as sparse arrays, “is.empty()” is better (for me).

Aliases
  • zero
  • empty
  • is.zero
  • is.empty
Examples
# NOT RUN {
a <- lone(1,3)

is.zero(a-a)  # should be TRUE

is.zero(zero(6))

x <- spray(t(0:1))
y <- spray(t(1:0))

is.zero((x+y)*(x-y)-(x^2-y^2)) # TRUE





# }
Documentation reproduced from package spray, version 1.0-8, License: GPL (>= 2)

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