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asNumeric

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

Multiple Precision Arithmetic

v0.6-2
GPL (>= 2)
Authors
Antoine Lucas, Immanuel Scholz, Rainer Boehme <rb-gmp@reflex-studio.de>, Sylvain Jasson <Sylvain.Jasson@inrae.fr>, Martin Maechler <maechler@stat.math.ethz.ch>
Initial release
2021-01-07

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