Example of inference in documentation is incorrect

[nguiard]

Hi,
I was trying inference, following the example in the doc:

    bn = DiscreteBayesNet()
    push!(bn, DiscreteCPD(:a, [0.3,0.7]))
    push!(bn, DiscreteCPD(:b, [0.2,0.8]))
    push!(bn, DiscreteCPD(:c, [:a, :b], [2,2],
            [Categorical([0.1,0.9]),
            Categorical([0.2,0.8]),
            Categorical([1.0,0.0]),
            Categorical([0.4,0.6]),
            ]))
    ϕ = infer(bn, :c, evidence=Assignment(:b=>1))

While this compiles fine, the output produced is:

2 instantiations:
  c (2)

While the doc says that the output is supposed to be:

2×2 DataFrame
Row	c	potential
Int64	Float64
1	1	0.17
2	2	0.83

This can be easily fixed by doing:

ϕ = DataFrame(infer(bn, :c, evidence=Assignment(:b=>1)))

instead of what is written in the docs. At first sight for someone new, it is not at all clear that this is what you have to do.