Cannot convert MDS{Float64} to series data for plotting

[kescobo]

In a brand new environment, using the same code I used in #230, I'm now getting an error

julia> using MultivariateStats, RDatasets, StatsPlots

julia> iris = dataset("datasets", "iris");

julia> X = convert(Matrix, iris[:, 1:4]);

julia> M = fit(MDS, X'; maxoutdim=2);

julia> plot(M, group=iris.Species)
ERROR: Cannot convert MDS{Float64} to series data for plotting
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] prepareSeriesData(::MDS{Float64}) at /Users/ksb/.julia/packages/Plots/WwFyB/src/series.jl:14
 [3] convertToAnyVector(::MDS{Float64}, ::Dict{Symbol,Any}) at /Users/ksb/.julia/packages/Plots/WwFyB/src/series.jl:26
 [4] macro expansion at /Users/ksb/.julia/packages/Plots/WwFyB/src/series.jl:130 [inlined]
 [5] apply_recipe(::Dict{Symbol,Any}, ::Type{Plots.SliceIt}, ::Nothing, ::MDS{Float64}, ::Nothing) at /Users/ksb/.julia/packages/RecipesBase/zBoFG/src/RecipesBase.jl:275
 [6] _process_userrecipes(::Plots.Plot{Plots.GRBackend}, ::Dict{Symbol,Any}, ::Tuple{MDS{Float64}}) at /Users/ksb/.julia/packages/Plots/WwFyB/src/pipeline.jl:83
 [7] _plot!(::Plots.Plot{Plots.GRBackend}, ::Dict{Symbol,Any}, ::Tuple{MDS{Float64}}) at /Users/ksb/.julia/packages/Plots/WwFyB/src/plot.jl:178
 [8] #plot#137(::Base.Iterators.Pairs{Symbol,CategoricalArray{String,1,UInt8,String,CategoricalString{UInt8},Union{}},Tuple{Symbol},NamedTuple{(:group,),Tuple{CategoricalArray{String,1,UInt8,String,CategoricalString{UInt8},Union{}}}}}, ::typeof(plot), ::MDS{Float64}) at /Users/ksb/.julia/packages/Plots/WwFyB/src/plot.jl:57
 [9] (::getfield(RecipesBase, Symbol("#kw##plot")))(::NamedTuple{(:group,),Tuple{CategoricalArray{String,1,UInt8,String,CategoricalString{UInt8},Union{}}}}, ::typeof(plot), ::MDS{Float64}) at ./none:0
 [10] top-level scope at REPL[7]:1

But, if I just copy and paste this recipe from ordinations.jl into the REPL, it works fine. Not really sure how to debug this...

[mkborregaard]

I cannot reproduce this

[kescobo]

Hmm - I can no longer reproduce in new environment, and adding Plots#master fixed it 🤷‍♂