(lispkit math util)
Library
(lispkit math util)
implements mathematical utility functions.(sgn x)

Implements the sign/signum function. Returns -1 if x is negative, 0 (or a signed zero, when inexact) if x is zero, and 1 if x is a positive number.
sgn
fails if x is not a real number.(numbers lo hi)
(numbers lo hi f)
(numbers lo hi guard f)

Returns a list of numbers by iterating from integer lo to integer hi (both inclusive) and applying function f to each integer in the range for which guard returns true. The default guard always returns true. The default for f is
identity
.(sum xs)

Returns the sum of all numbers of list xs. This procedure fails if there is an element in xs which is not a number.
(product xs)

Returns the product of all numbers of list xs. This procedure fails if there is an element in xs which is not a number.
(minimum xs)

Returns the minimum of all numbers of list xs. This procedure fails if there is an element in xs which is not a number.
(maximum xs)

Returns the maximum of all numbers of list xs. This procedure fails if there is an element in xs which is not a number.
(conjugate x)

Conjugates number x. For real numbers x,
conjugate
returns x, otherwise x is being returned with the opposite sign for the imaginary part.(degrees->radians x)

Converts degrees into radians.
(radians->degrees x)

Converts radians into degrees.
(prime? n)

Returns
#t
if integer n is a prime number, #f
otherwise.(make-nan neg quiet payload)

Returns a NaN whose sign bit is equal to neg (
#t
for negative, #f
for positive), whose quiet bit is equal to quiet (#t
for quiet, #f
for signaling), and whose payload is the positive exact integer payload. It is an error if payload is larger than a NaN can hold.(nan-negative? x)

Returns
#t
if the sign bit of x is 1 and #f
otherwise.(nan-quiet? x)

Returns
#t
if x is a quiet NaN.(nan-payload x)

Returns the payload bits of floating-point number x as a positive exact integer.
(nan=? x y)

Returns
#t
if x and y have the same sign, quiet bit, and payload; and #f
otherwise.Last modified 11mo ago