Extra standart ribbon in plot_erp

[vladdez]

[behinger]

possibly related to:
#55

my guess is that some group/col/row variables are not correctly applied to the ribbon

[vladdez]

It seems like they have never been applied at all

[behinger]

possibly easy fix then :)

[behinger]

but be aware that a mapping*(visual+ribbon) would apply them to both, so that could be a good solution; not sure how it is implemented right now

[vladdez]

currently it is implemented like this:

    # check if stderror values exist and create new columns with high and low band
    if "stderror" ∈ names(plot_data) && stderror
        plot_data.stderror = plot_data.stderror .|> a -> isnothing(a) ? 0.0 : a
        plot_data[!, :se_low] = plot_data[:, config.mapping.y] .- plot_data.stderror
        plot_data[!, :se_high] = plot_data[:, config.mapping.y] .+ plot_data.stderror
    end
   ...
    if stderror
        m_se = AlgebraOfGraphics.mapping(config.mapping.x, :se_low, :se_high)
        basic = basic + visual(Band, alpha = 0.5) * m_se
    end 

[vladdez]

fixed in #237