band plot gives artifact

[tbenst]

Xs = repeat(collect(1:100), 10)
Ys = sin.(Xs) + randn(1000)*0.2
df = DataFrame(x=Xs, y=Ys)
df = transform(groupby(df, ["x"]),
    "y" => mean, "y" => minimum, "y" => maximum)
data(df) * mapping(:x, :y_minimum, :y_maximum) * visual(Band) |> draw

[jkrumbiegel]

This is in the nature of the data you prepared, your x values loop back to 1 after reaching 100. If you sort or filter the data, the problem goes away.

[tbenst]

oh! transform didn't do what i expected. this works :)

using AlgebraOfGraphics, DataFrames, StatsBase, CairoMakie
Xs = repeat(collect(1:100), 10)
Ys = sin.(Xs) + randn(1000)*0.2
df = DataFrame(x=Xs, y=Ys)
df = transform(groupby(df, ["x"]),
    "y" => mean, "y" => minimum, "y" => maximum)[1:100,:]
data(df) * mapping(:x, :y_minimum, :y_maximum) * visual(Band) |> draw