as.function.spray
From spray v1.0-6
by Robin K S Hankin
Coerce a spray object to a function
Coerce a spray object to a function
- Keywords
- symbolmath
Usage
# S3 method for spray
as.function(x,...)
Arguments
- x
spray object, interpreted as a multivariate polynomial
- ...
Further arguments, currently ignored
Value
Returns a function; this function returns a numeric vector.
Note
Coercion is possible even if some indices are zero or negative.
The function is not vectorized in the arity of its argument.
Examples
# NOT RUN {
S1 <- spray(matrix(sample(-2:2,replace=TRUE,21),ncol=3),rnorm(7),addrepeats=TRUE)
S2 <- spray(matrix(sample(-2:2,replace=TRUE,15),ncol=3),rnorm(5),addrepeats=TRUE)
f1 <- as.function(S1)
f2 <- as.function(S2)
f3 <- as.function(S1*S2)
x <- 4:6
f1(x)*f2(x)-f3(x) # should be zero
# coercion is vectorized:
f1(matrix(1:33,ncol=3))
# }
Community examples
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