Why is igamma undefined?

Hi,

Does anybody know why "igamma" function is not defined, while the symbolic toolbox is already installed. I can define symbolic variables and use gamma function by the way.

Thanks, Bo

Answer 1

[Walter Roberson]

Possibly your MATLAB is too old to have igamma() . Please see http://www.mathworks.com/support/solutions/en/data/1-4TW73U/index.html?product=SM&solution=1-4TW73U

Answer 2

[Sean de Wolski]

igamma is a MuPad function.

To use it, open a MuPad notebook and you can see the doc for it in there:

mupad

Else look at doc gammainc