String column selector does not work in mapping()

[msberk]

Bug description

I am unable to use string-typed column selectors in mapping(), which should be possible according to the documentation. Wrapping the strings in Symbol resolves the issue.

Steps to reproduce

using AlgebraOfGraphics, CairoMakie
using DataFrames

x = 0.0:0.1:2.0*π
ysin = sin.(x)
df = DataFrame("Time (s)" => x, "Magnitude" => ysin)

draw(data(df) * mapping("Time (s)", "Magnitude") * visual(Lines))

Error reporting

ERROR: Unknown color: Time (s)
Stacktrace:
  [1] error(::String, ::String)
    @ Base .\error.jl:44
  [2] _parse_colorant(desc::String)
    @ Colors C:\Users\mb699\.julia\packages\Colors\E2qak\src\parse.jl:151
  [3] parse
    @ C:\Users\mb699\.julia\packages\Colors\E2qak\src\parse.jl:207 [inlined]
  [4] parse_colorant
    @ C:\Users\mb699\.julia\packages\Compose\9ma5l\src\Compose.jl:43 [inlined]
  [5] fill(c::String)
    @ Compose C:\Users\mb699\.julia\packages\Compose\9ma5l\src\property.jl:78
  [6] (::AlgebraOfGraphics.var"#wrap#172")(x::String)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:17
  [7] (::AlgebraOfGraphics.var"#170#175"{Vector{Any}})(v::String)
    @ AlgebraOfGraphics .\none:0
  [8] iterate
    @ .\generator.jl:48 [inlined]
  [9] iterate
    @ .\iterators.jl:1253 [inlined]
 [10] iterate(f::Base.Iterators.Flatten{Base.Generator{Tuple{…}, AlgebraOfGraphics.var"#171#174"}})
    @ Base.Iterators .\iterators.jl:1247
 [11] shape
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:23 [inlined]
 [12] getlabeledarray(layer::Layer, s::String)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:67
 [13] (::AlgebraOfGraphics.var"#204#210"{Layer})(v::String)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:128
 [14] iterate
    @ .\generator.jl:48 [inlined]
 [15] _collect(c::Vector{…}, itr::Base.Generator{…}, ::Base.EltypeUnknown, isz::Base.HasShape{…})
    @ Base .\array.jl:800
 [16] collect_similar
    @ .\array.jl:709 [inlined]
 [17] map
    @ .\abstractarray.jl:3371 [inlined]
 [18] process_mappings(layer::Layer)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:128
 [19] process(layer::Layer)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\processing.jl:162
 [20] ProcessedLayers
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\layers.jl:55 [inlined]
 [21] compute_axes_grid(d::Layer, scales::AlgebraOfGraphics.Scales; axis::Dictionaries.Dictionary{Symbol, Any})
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\layers.jl:250
 [22] compute_axes_grid
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\layers.jl:248 [inlined]
 [23] compute_axes_grid(fig::Figure, d::Layer, scales::AlgebraOfGraphics.Scales; axis::Dictionaries.Dictionary{Symbol, Any})
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\layers.jl:218
 [24] compute_axes_grid
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\algebra\layers.jl:215 [inlined]
 [25] #363
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:20 [inlined]
 [26] update
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:10 [inlined]
 [27] plot!(fig::Figure, d::Layer, scales::AlgebraOfGraphics.Scales; axis::Dictionaries.Dictionary{Symbol, Any})
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:20
 [28] plot!
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:16 [inlined]
 [29] (::AlgebraOfGraphics.var"#374#379"{…})(f::Figure)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:162
 [30] update
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:10 [inlined]
 [31] _draw(d::Layer, scales::AlgebraOfGraphics.Scales; axis::Dictionaries.Dictionary{…}, figure::Dictionaries.Dictionary{…}, facet::Dictionaries.Dictionary{…}, legend::Dictionaries.Dictionary{…}, colorbar::Dictionaries.Dictionary{…})
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:161
 [32] _draw
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:154 [inlined]
 [33] draw(d::Layer, scales::AlgebraOfGraphics.Scales; axis::@NamedTuple{…}, figure::@NamedTuple{}, facet::@NamedTuple{}, legend::@NamedTuple{}, colorbar::@NamedTuple{}, palette::Nothing)
    @ AlgebraOfGraphics C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:85
 [34] draw
    @ C:\Users\mb699\.julia\packages\AlgebraOfGraphics\BPWA1\src\draw.jl:75 [inlined]
 [35] top-level scope
    @ c:\Users\mb699\git\julia\ReadWrf\src\scratch.jl:11
Some type information was truncated. Use `show(err)` to see complete types.

Version info

julia> versioninfo()
Julia Version 1.11.0
Commit 501a4f25c2 (2024-10-07 11:40 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 16 × 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
  WORD_SIZE: 64
  LLVM: libLLVM-16.0.6 (ORCJIT, tigerlake)
Threads: 1 default, 0 interactive, 1 GC (on 16 virtual cores)
Environment:
  JULIA_EDITOR = code
  JULIA_NUM_THREADS =

  [cbdf2221] AlgebraOfGraphics v0.8.13
  [13f3f980] CairoMakie v0.12.16
  [e9467ef8] GLMakie v0.10.16
  [a93c6f00] DataFrames v1.7.0

Before opening an issue

• Make sure you are on the latest release of AlgebraOfGraphics and Makie.
• Make sure no other issue exists describing the same problem you have encountered.