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Fix bug with compute_p for partially observed OrderedLogistic and OrderedProbit variables #7349

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merged 2 commits into from
Jun 5, 2024

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ricardoV94
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@ricardoV94 ricardoV94 commented Jun 5, 2024

This fixes a bug when auto-imputation takes place, in which case the logic to retrieve p wasn't valid. This will also show p as an input of the underlying Categorical in the graphviz.

Description

This PR fixes a bug when setting compute_p=True for partially observed OrderedLogistic/Probit. The logic of retrieving p from the third input does not work in this case, because when there is imputation a different kind of variable is returned (the joined vector of imputed and observed variables)

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  • New feature / enhancement
  • Bug fix
  • Documentation
  • Maintenance
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📚 Documentation preview 📚: https://pymc--7349.org.readthedocs.build/en/7349/

This fixes a bug when auto-imputation takes place, in which case the logic to retrieve `p` wasn't valid. This will also show `p` as an input of the underlying Categorical in the graphviz.
@ricardoV94 ricardoV94 added the bug label Jun 5, 2024
This fixes a bug when auto-imputation takes place, in which case the logic to retrieve `p` wasn't valid. This will also show `p` as an input of the underlying Categorical in the graphviz.
if compute_p:
pm.Deterministic(f"{name}_probs", out_rv.owner.inputs[3], dims=kwargs.get("dims"))
p = pm.Deterministic(f"{name}_probs", p, dims=kwargs.get("dims"))
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The changes have the nice side-effect that p will now be an arrow going into the underlying Categorical

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@AlexAndorra AlexAndorra left a comment

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Good catch @ricardoV94 !

@AlexAndorra AlexAndorra merged commit b6c890e into pymc-devs:main Jun 5, 2024
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@ricardoV94 ricardoV94 deleted the fix_ordered_dists branch June 5, 2024 22:38
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2 participants