# Matlab and lambertw function

I have Matlab 7.9.0 (R2009b) I want use the W lambert function. does someone know if Lambertw is only available to updated version of Matlab ? or if i need to do something before ? I am not very good with matlab because i learn with Scilab, Maple and python.

I tried with scilab but i can't made the specfun function work. It's working with python (scipy.special) but i am not as good to solve ode with python.

The lambertw function is part of MATLAB's symbolic toolbox. Regardless of version, you must have this toolbox installed to use the function.