GaussianRandomWalk parameters

Questions
1

In the timeseries doc page, the GaussianRandomWalk (as well as AR actually) has a sd parameter as well as sigma parameter. How are they different? The docs do not seem to refer to the sd parameter anywhere.

https://docs.pymc.io/api/distributions/timeseries.html#pymc3.distributions.timeseries.GaussianRandomWalk

Thanks for your insight,
Gregory

2

The sd parameter is equivalent to sigma parameter but deprecated since pymc3 v3.8. You can specify either of those for now but in future sd would be removed.

3

Many thanks for your clarification!