[gradsusr] Weibull distribution parameters

[Wagner Galichio]

Dear all, 

I need to develop a script to calculate the shape (k) and scale (C) parameters of the Weibull distribution, based on WAsP algorithm.
The problem is that this calculation involves a gama function, and "k" calculation is done using the Brent method (iterative method). 

Do you have any tips on how to do this script? 

Thank you all in advance. 
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