Scroll to navigation

math(3erl) Erlang Module Definition math(3erl)

NAME

math - Mathematical Functions

DESCRIPTION

This module provides an interface to a number of mathematical functions.
Note:
Not all functions are implemented on all platforms. In particular, the erf/1 and erfc/1 functions are not implemented on Windows.

EXPORTS


pi() -> float()

 
 
A useful number.

sin(X) -> float()

 
 

cos(X) -> float()

 
 

tan(X) -> float()

 
 

asin(X) -> float()

 
 

acos(X) -> float()

 
 

atan(X) -> float()

 
 

atan2(Y, X) -> float()

 
 

sinh(X) -> float()

 
 

cosh(X) -> float()

 
 

tanh(X) -> float()

 
 

asinh(X) -> float()

 
 

acosh(X) -> float()

 
 

atanh(X) -> float()

 
 

exp(X) -> float()

 
 

log(X) -> float()

 
 

log10(X) -> float()

 
 

pow(X, Y) -> float()

 
 

sqrt(X) -> float()

 
 
Types:
Y = X = number()
 
A collection of math functions which return floats. Arguments are numbers.

erf(X) -> float()

 
 
Types:
X = number()
 
Returns the error function of X, where 

erf(X) = 2/sqrt(pi)*integral from 0 to X of exp(-t*t) dt.        


erfc(X) -> float()

 
 
Types:
X = number()
 
erfc(X) returns 1.0 - erf(X), computed by methods that avoid cancellation for large X.

BUGS

As these are the C library, the bugs are the same.
stdlib 2.2 Ericsson AB