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Replace rvs_to_total_sizes mapping by MinibatchRandomVariables #6523

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merged 1 commit into from
Feb 28, 2023

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ricardoV94
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@ricardoV94 ricardoV94 commented Feb 14, 2023

This PR refactors the way rescaling of minibatched variables is achieved, so as to not require keeping any meta-information at the model level.

Ideally, the API would follow that of other RV factories with something like pm.MinibatchRV(dist=dist, total_size=...) so that we don't have to add any extra complexity at the Model level, but for the sake of backwards compatibility we let Model do this for now.

I removed support for scaling of non-observed RVs even though it would be equally easy to support them. This is a breaking change

Closes #6061
Closes #6332

@ricardoV94 ricardoV94 added maintenance major Include in major changes release notes section labels Feb 14, 2023
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codecov bot commented Feb 14, 2023

Codecov Report

Merging #6523 (ecba5bb) into main (14a10b7) will increase coverage by 0.00%.
The diff coverage is 98.55%.

Additional details and impacted files

Impacted file tree graph

@@           Coverage Diff           @@
##             main    #6523   +/-   ##
=======================================
  Coverage   91.91%   91.92%           
=======================================
  Files          89       90    +1     
  Lines       14936    14955   +19     
=======================================
+ Hits        13729    13747   +18     
- Misses       1207     1208    +1     
Impacted Files Coverage Δ
pymc/util.py 80.00% <ø> (ø)
pymc/model.py 89.79% <88.88%> (-0.11%) ⬇️
pymc/logprob/joint_logprob.py 98.88% <100.00%> (-0.35%) ⬇️
pymc/variational/minibatch_rv.py 100.00% <100.00%> (ø)
pymc/variational/opvi.py 87.48% <100.00%> (ø)

@ricardoV94 ricardoV94 changed the title Replace rvs_to_total_sizes mapping by RescaledRandomVariables Replace rvs_to_total_sizes mapping by MinibatchRandomVariables Feb 28, 2023
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I like the proposed design change

pymc/variational/minibatch_rv.py Outdated Show resolved Hide resolved


@_logprob.register(MinibatchRandomVariable)
def minibatch_rv_logprob(op, values, *inputs, **kwargs):
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This is much more intuitive now

@ricardoV94 ricardoV94 merged commit 1ca1c94 into pymc-devs:main Feb 28, 2023
@ricardoV94 ricardoV94 deleted the remove_totalsize_mapping branch June 6, 2023 03:04
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