rspray {spray}

Random spray objects

Description

Creates random spray objects as quick-and-dirty examples of multivariate polynomials

Usage

rspray(n=9, vals = seq_len(n), arity = 3, powers = 0:2)

Arguments

n

Number of distinct rows (maximum); repeated rows are merged (argument addrepeats is TRUE)

vals

Values to use for coefficients

arity

Arity of the spray; the number of columns in the index matrix

powers

Set from which to sample the entries of the index matrix

Value

Returns a spray object

Note

If the index matrix contains repeated rows, the returned spray object will contain fewer than n entries

Author(s)

Robin K. S. Hankin

See Also

spray

Examples

rspray()

rspray(4)*rspray(3,rnorm(3))

rspray(3,arity=7,powers=-2:2)^3

rspray(1000,vals=rnorm(1000))