gammaln - The logarithm of gamma function.

Calling Sequence

y = gammaln(x)

Parameters

• x : real vector
• y : real vector with same size.

Description

gammaln(x) evaluates the logarithm of gamma function at all the elements of x, avoiding underflow and overflow. x must be real.

Examples

gammaln(0.5)

 

See Also

gamma  dlgamma  

Author

W. J. Cody and L. Stoltz (code from Netlib (specfun))