Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 1.

failed to run `@example` block in source/validate.md:156-182 ```@example using Plots, Clustering X = hcat([4., 5.] .+ 0.4 * randn(2, 10), [9., -5.] .+ 0.4 * randn(2, 5), [-4., -9.] .+ 1 * randn(2, 5)) clusterings = kmeans.(Ref(X), 2:5) hard_indices = [:silhouettes, :calinski_harabasz, :xie_beni, :davies_bouldin, :dunn] kmeans_quality = Dict(qidx => clustering_quality.(Ref(X), clusterings, quality_index = qidx) for qidx in hard_indices ) p = [ plot(2:5, kmeans_quality[qidx], marker = :circle, title = string.(qidx), label = nothing, ) for qidx in hard_indices ] plot(p..., layout = (3,2), plot_title = "Quality indices for various number of clusters" ) ``` exception = UndefVarError: `center` not defined Stacktrace: [1] (::Clustering.var"#49#50"{Distances.SqEuclidean, Matrix{Float64}})(::Tuple{Int64, Int64}) @ Clustering ./abstractarray.jl:0 [2] MappingRF @ ./reduce.jl:95 [inlined] [3] _foldl_impl(op::Base.MappingRF{Clustering.var"#49#50"{Distances.SqEuclidean, Matrix{Float64}}, Base.BottomRF{typeof(Base.add_sum)}}, init::Base._InitialValue, itr::Base.Iterators.Enumerate{Vector{Int64}}) @ Base ./reduce.jl:58 [4] foldl_impl @ ./reduce.jl:48 [inlined] [5] mapfoldl_impl @ ./reduce.jl:44 [inlined] [6] #mapfoldl#288 @ ./reduce.jl:170 [inlined] [7] mapfoldl @ ./reduce.jl:170 [inlined] [8] #mapreduce#292 @ ./reduce.jl:302 [inlined] [9] mapreduce @ ./reduce.jl:302 [inlined] [10] #sum#295 @ ./reduce.jl:530 [inlined] [11] sum @ ./reduce.jl:530 [inlined] [12] #sum#296 @ ./reduce.jl:559 [inlined] [13] sum @ ./reduce.jl:559 [inlined] [14] _inner_inertia @ ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:172 [inlined] [15] _cluquality_calinski_harabasz(data::Matrix{Float64}, centers::Matrix{Float64}, assignments::Vector{Int64}, metric::Distances.SqEuclidean) @ Clustering ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:199 [16] clustering_quality(data::Matrix{Float64}, centers::Matrix{Float64}, assignments::Vector{Int64}; quality_index::Symbol, metric::Distances.SqEuclidean) @ Clustering ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:73 [17] clustering_quality @ ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:54 [inlined] [18] #clustering_quality#40 @ ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:87 [inlined] [19] clustering_quality @ ~/work/Clustering.jl/Clustering.jl/src/clustering_quality.jl:87 [inlined] [20] #43 @ ./broadcast.jl:1297 [inlined] [21] _broadcast_getindex_evalf @ ./broadcast.jl:683 [inlined] [22] _broadcast_getindex @ ./broadcast.jl:656 [inlined] [23] getindex @ ./broadcast.jl:610 [inlined] [24] copy @ ./broadcast.jl:912 [inlined] [25] materialize(bc::Base.Broadcast.Broadcasted{Base.Broadcast.DefaultArrayStyle{1}, Nothing, Base.Broadcast.var"#43#44"{Base.Pairs{Symbol, Symbol, Tuple{Symbol}, NamedTuple{(:quality_index,), Tuple{Symbol}}}, typeof(clustering_quality)}, Tuple{Base.RefValue{Matrix{Float64}}, Vector{KmeansResult{Matrix{Float64}, Float64, Int64}}}}) @ Base.Broadcast ./broadcast.jl:873 [26] (::Main.__atexample__300.var"#1#2")(qidx::Symbol) @ Main.__atexample__300 ./none:0 [27] iterate @ ./generator.jl:47 [inlined] [28] _all(f::Base.var"#372#374", itr::Base.Generator{Vector{Symbol}, Main.__atexample__300.var"#1#2"}, #unused#::Colon) @ Base ./reduce.jl:1292 [29] all @ ./reduce.jl:1278 [inlined] [30] Dict(kv::Base.Generator{Vector{Symbol}, Main.__atexample__300.var"#1#2"}) @ Base ./dict.jl:111 [31] top-level scope @ validate.md:165 [32] eval @ ./boot.jl:370 [inlined] [33] #54 @ ~/.julia/packages/Documenter/nQAq5/src/expander_pi