numeric: Numeric functions

In wwbrannon/schemeR: Ports of Lisp/Scheme Features to R

Description

These functions provide Lisp/Scheme-friendly aliases for and thin wrappers around some numeric infix operators from base R.

Usage

expt(e1, e2)

quotient(e1, e2)

remainder(e1, e2)

modulo(e1, e2)

is.number(x)

is.even(x)

is.odd(x)

is.zero(x)

is.positive(x)

is.negative(x)

Arguments

e1	For expt, quotient, remainder and modulo, the left-hand argument to the underlying infix operator.
e2	For expt, quotient, remainder and modulo, the right-hand argument to the underlying infix operator.
x	An R object on which to check a predicate.

Details

The expt, quotient, remainder and modulo functions are aliases for the following base operators:

• expt is ^

• quotient is %/%

• remainder is %%

• modulo is also %%

The is.number function is an alias for the is.numeric function from base; the other is.* functions are simple predicates that do what their names suggest.

Value

For the is.* functions, TRUE or FALSE; for expt, quotient, remainder and modulo, the result of the operation.

Examples

expt(4, 5) == 4^5 #=> 1024

quotient(10, 3) == 10 %/% 3 #=> 3

remainder(10, 3) == 10 %% 3 #=> 1

modulo(10, 3) == 10 %% 3 #=> 1

is.number(3) && !is.number("foo")

is.even(22) && !is.even(23)

is.odd(23) && !is.odd(22)

is.zero(0) && !is.zero(1)

is.positive(234) && !is.positive(-34)

is.negative(-34) && !is.negative(234)

wwbrannon/schemeR documentation built on May 4, 2019, 12:03 p.m.