(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 5mo ago