OpenEuphoria

arctanh

include math.e 
namespace math 
public function arctanh(abs_below_1 a) 

computes the reverse hyperbolic tangent of an object.

Parameters:

1. x : the object to process.

Returns:

An object, the same shape as x, each atom of which was acted upon.

Errors:

Since tanh only takes values between -1 and +1 excluded, an out of range argument causes an error.

Comments:

The hyperbolic cosine grows like the logarithm function.

Example 1:

? arctanh(1/2) -- prints out 0,5493061443340548456976 

See Also:

arccos, arcsinh, cosh