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Merged
merged 3 commits into from
Jun 30, 2025
Merged

Update VI Tutorial #625

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50559ac
update Turing version
Red-Portal Jun 19, 2025
07cf469
Merge branch 'main' of github.com:TuringLang/docs
Red-Portal Jun 29, 2025
182b478
update VI tutorial to automatically extract varnames
Red-Portal Jun 29, 2025
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5 changes: 4 additions & 1 deletion tutorials/variational-inference/index.qmd
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Expand Up @@ -332,10 +332,13 @@ avg[union(sym2range[:coefficients]...)]

For further convenience, we can wrap the samples into a `Chains` object to summarize the results.
```{julia}
varnames = vcat(["σ²", "intercept"], ["coefficients[$i]" for i in 1:n_vars])
varinf = Turing.DynamicPPL.VarInfo(m)
vns_and_values = Turing.DynamicPPL.varname_and_value_leaves(Turing.DynamicPPL.values_as(varinf, OrderedDict))
varnames = map(first, vns_and_values)
vi_chain = Chains(reshape(z', (size(z,2), size(z,1), 1)), varnames)
```
(Since we're drawing independent samples, we can simply ignore the ESS and Rhat metrics.)
Unfortunately, extracting `varnames` is a bit verbose at the moment, but hopefully will become simpler in the near future.

Let's compare this against samples from `NUTS`:

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