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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 provided on all platforms. In particular, the erf/1 and erfc/1 functions are not provided on Windows.

EXPORTS

acos(X) -> float()




acosh(X) -> float()




asin(X) -> float()




asinh(X) -> float()




atan(X) -> float()




atan2(Y, X) -> float()




atanh(X) -> float()




cos(X) -> float()




cosh(X) -> float()




exp(X) -> float()




log(X) -> float()




log10(X) -> float()




log2(X) -> float()




pow(X, Y) -> float()




sin(X) -> float()




sinh(X) -> float()




sqrt(X) -> float()




tan(X) -> float()




tanh(X) -> float()

Types:

Y = X = number()

A collection of mathematical functions that 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.

pi() -> float()

A useful number.

LIMITATIONS

As these are the C library, the same limitations apply.
stdlib 3.2 Ericsson AB