Hello, when I use the example from https://github.com/JuliaPlots/StatsPlots.jl
using DataFrames, StatsPlots df = DataFrame(a = 1:10, b = 10 .* rand(10), c = 10 .* rand(10)) @df df plot(:a, cols(2:3), colour = [:red :blue])
I get the error
ArgumentError: unsupported symbol b passed to label Does anyone know what I am missing?