asNumeric: Coerce to 'numeric', not Loosing Dimensions

In gmp: Multiple Precision Arithmetic

Coerce to 'numeric', not Loosing Dimensions

Description

a number-like object is coerced to type (typeof) "numeric", keeping dim (and maybe dimnames) when present.

Usage

asNumeric(x)

Arguments

x	a “number-like” object, e.g., big integer (bigz), or mpfr, notably including matrices and arrays of such numbers.

Value

an R object of type (typeof) "numeric", a matrix or array if x had non-NULL dimension dim().

Methods

signature(x = "ANY")

the default method, which is the identity for numeric array.

signature(x = "bigq")

the method for big rationals.

signature(x = "bigq")

the method for big integers.

Note that package Rmpfr provides methods for its own number-like objects.

Author(s)

Martin Maechler

See Also

as.numeric coerces to both "numeric" and to a vector, whereas asNumeric() should keep dim (and other) attributes.

Examples

m <- matrix(1:6, 2,3)
stopifnot(identical(m, asNumeric(m)))# remains matrix

(M <- as.bigz(m) / 5) ##-> "bigq" matrix
asNumeric(M) # numeric matrix
stopifnot(all.equal(asNumeric(M), m/5))

gmp documentation built on Sept. 11, 2024, 7:37 p.m.