Issue/870 affine xform clarification #872
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bob-carpenter
requested changes
Apr 9, 2025
| vector<multiplier=exp(y/2)>[9] x; | ||
| } | ||
| model { | ||
| y ~ std_normal(); // implies y ~ normal(0, 3) |
| transformed parameter. | ||
| sampled as independent standard normals, which is easy for Stan, | ||
| and then transformed into samples from the funnel. | ||
| When this reparameterization is used in Stan code, a comment indicating what the |
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Although they are technically reparameterizations under the hood, I think we should stick to calling them transforms. The terminology is confusing if you have any suggestions---the problem is that with the affine transform there is no constraining or unconstraining. The domain and range of the transform function are the same---it's just a bijection over the whole real number line.
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The submodule changes should not be committed here |
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I don't know how or why the quarto-config was touched by this PR and I have spent the past hour trying to undo this. |
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Try
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WardBrian
reviewed
Apr 9, 2025
bob-carpenter
requested changes
Apr 10, 2025
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Submission Checklist
<<{ since VERSION }>>Summary
Minor clarifications to Reference Manual on affine transform, added example of Neal's funnel using affine xform to Stan User's Guide chapter on efficiency tuning.
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