atanh
Inverse hyperbolic tangent.
y=atanh(x)
Inputs
x An array of real or complex numbers.
y An array of same size as x . Each element of the output is the inverse hyperbolic tangent of the corresponding element of the input.


Example
>>a=randn(3,2)
>>t=tanh(a)
>>at=atanh(t)
>>a
      -0.6112      -1.4058
       1.5007       -0.982
      -0.5599      -1.0629

>>at
      -0.6112      -1.4058
       1.5007       -0.982
      -0.5599      -1.0629