subs {spray}

Substitute values into a spray object

Description

Substitute values into a spray object, interpreted as a multivariate polynomial

Usage

subs(S, dims, x, drop=TRUE)

Arguments

S

spray object

dims

Integer or logical vector with entries corresponding to the dimensions to be substituted

x

Numeric vector of values to be substituted

drop

Boolean, with default TRUE meaning to return the drop() of the result, and FALSE meaning to return a spray object consistently

Note

It is much easier if argument dims is sorted into increasing order. If not, caveat emptor!

Author(s)

Robin K. S. Hankin

See Also

process_dimensions

Examples

(S <- spray(matrix(sample(0:3,60,replace=TRUE),nrow=12)))

subs(S,c(2,5),1:2)

P <- homog(3,3)
subs(P,1,2)