Hi everybody, I’m going to write a power-law distribution ( y = x^-2) in which x comes from a uniform distribution in [0,100] interval. According to this topic I could write the following code: import theano.tensor as tt def power_law(alpha): def logp(x): log_density = -alpha*tt.log(x) return…

That’s expected when not defining the interval transform so that the sampler can work on an unconstrained space. This seems to sample from the prior without divergences so it might work for you: import pymc3.distributions.transforms as tr def power(alpha): def logp(value): return tt.switch(…

Writing a new distribution (2)

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fizikdan May 6, 2021, 8:35am 13

Is there a way to obtain a power-law dist with this approach?

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Writing a new distribution (2)

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