[Numpy-discussion] weibull distribution has only one parameter?

D.Hendriks (Dennis) D.Hendriks at tue.nl
Mon Nov 12 03:51:55 EST 2007

According to (for instance) 
http://en.wikipedia.org/wiki/Weibull_distribution the Weibull 
distribution has two parameters: lambda > 0 is the scale parameter 
(real) and k > 0 is the shape parameter (real). However, the 
numpy.random.weibull function has only a single 'a' parameter (except 
for the size parameter which indicates the size of the array to fill 
with values - this is NOT a parameter of the distribution itself). My 
question is how this 'a' parameter translates to the Weibull 
distribution as it 'normally' is and how to sample the distribution when 
I have the lambda and k parameters?

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