flint (version 0.0.3)

Part: Get or Set One Part of a Vector

Description

The subclasses of virtual class flint are interfaces to C types in the FLINT C library. For types implemented recursively as C structs, it is often very natural to get and set the struct members. The functions documented here provide support for this common operation; they are all S4 generic.

Usage

Num(q)
Num(q) <- value
Den(q)
Den(q) <- value
Mid(x)
Mid(x) <- value
Rad(x)
Rad(x) <- value
Real(z)
Real(z) <- value
Imag(z)
Imag(z) <- value

Value

Num, Den, Mid, Rad, Real, and

Imag return a vector-like R object of length matching the argument. The replacement forms return a vector-like R object of length matching either the argument or the replacement value; the class of the result is, if not the class of the argument, then a superclass. See ‘Details’ for behaviour specific to methods in package flint.

Arguments

q

a vector-like R object with elements representing quotients of numbers. Package flint provides methods for class fmpq.

x

a vector-like R object with elements representing balls in a metric space. Package flint provides methods for class arb.

z

a vector-like R object with elements representing complex numbers. Package flint provides methods for classes acf and acb.

value

a vector-like R object; the replacement value. Methods in package flint support atomic vectors and vectors inheriting from virtual class flint. They inherit recycling behaviour from methods for initialize; see, e.g., selectMethod("Num<-", "fmpq").

Details

Num and Den extract fmpz numerators and denominators from fmpq q. The replacement form of Num constructs a new fmpq vector from value (coerced to fmpz) and Den(q). The replacement form of Den constructs a new fmpq vector from Num(q) and value (coerced to fmpz).

Mid and Rad extract arf midpoints and mag radii from arb x. The replacement form of Mid constructs a new arb vector from value (coerced to arf) and Rad(x). The replacement form of Rad constructs a new arb vector from Mid(x) and value (coerced to mag).

Real and Imag extract arf real and imaginary parts from acf z and arb real and imaginary parts from acb z. The replacement form of Real constructs a new acf or acb vector from value (coerced to arf or arb) and Imag(z). The replacement form of Imag constructs a new acf or acb vector from Real(z) and value (coerced to arf or arb).

See Also

Virtual class flint.

Examples

(q <- q. <- .fmpq(num = 1:10, den = 2L))
Num(q)
Den(q)
Num(q) <- Den(q)
q
(m <- Num(q))
(n <- Den(q))
stopifnot(m == 1L, n == 1L, q == 1L)