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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()



ceil(X) -> float()



cos(X) -> float()



cosh(X) -> float()



exp(X) -> float()



floor(X) -> float()



fmod(X, Y) -> 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 4.0.1 Ericsson AB