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feat(makie): implement area-stacked (#10286)
## Implementation: `area-stacked` - julia/makie Implements the **julia/makie** version of `area-stacked`. **File:** `plots/area-stacked/implementations/julia/makie.jl` **Parent Issue:** #2022 --- :robot: *[impl-generate workflow](https://github.com/MarkusNeusinger/anyplot/actions/runs/32033006827)* --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com> Co-authored-by: Markus Neusinger <2921697+MarkusNeusinger@users.noreply.github.com>
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‎plots/area-stacked/implementations/julia/makie.jl‎

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# anyplot.ai
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# area-stacked: Stacked Area Chart
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# Library: makie 0.21.9 | Julia 1.11.9
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# Quality: 87/100 | Created: 2026-08-17
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using CairoMakie
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using Colors
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using Random
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Random.seed!(42)
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# --- Theme tokens -------------------------------------------------------------
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THEME = get(ENV, "ANYPLOT_THEME", "light")
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PAGE_BG = THEME == "light" ? colorant"#FAF8F1" : colorant"#1A1A17"
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INK = THEME == "light" ? colorant"#1A1A17" : colorant"#F0EFE8"
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INK_SOFT = THEME == "light" ? colorant"#4A4A44" : colorant"#B8B7B0"
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IMPRINT_PALETTE = [
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colorant"#009E73", colorant"#C475FD", colorant"#4467A3", colorant"#BD8233",
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]
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# --- Data -----------------------------------------------------------------------
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# Monthly revenue ($ thousands) by product category, two years — largest series first
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months = 1:24
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month_labels = ["Jan 2024", "Apr 2024", "Jul 2024", "Oct 2024",
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"Jan 2025", "Apr 2025", "Jul 2025", "Oct 2025"]
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electronics = 42 .+ 0.9 .* months .+ 4 .* sin.(months ./ 3) .+ randn(24) .* 3
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home_goods = 26 .+ 0.4 .* months .+ 3 .* sin.(months ./ 4 .+ 1) .+ randn(24) .* 2.5
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apparel = 18 .+ 0.15 .* months .+ 5 .* sin.(months ./ 6 .+ 2) .+ randn(24) .* 2
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sporting = 10 .+ 0.25 .* months .+ 2 .* sin.(months ./ 5) .+ randn(24) .* 1.5
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electronics = max.(electronics, 5)
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home_goods = max.(home_goods, 4)
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apparel = max.(apparel, 3)
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sporting = max.(sporting, 2)
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baseline = zeros(24)
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cum1 = electronics
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cum2 = cum1 .+ home_goods
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cum3 = cum2 .+ apparel
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cum4 = cum3 .+ sporting
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# --- Plot -------------------------------------------------------------------------
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fig = Figure(
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resolution = (1600, 900),
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fontsize = 14,
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backgroundcolor = PAGE_BG,
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)
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ax = Axis(
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fig[1, 1];
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title = "area-stacked · julia · makie · anyplot.ai",
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titlesize = 25,
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titlecolor = INK,
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xlabel = "Month",
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ylabel = "Revenue (\$ thousands)",
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xlabelsize = 14,
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ylabelsize = 14,
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xlabelcolor = INK,
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ylabelcolor = INK,
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xticklabelsize = 12,
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yticklabelsize = 12,
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xticklabelcolor = INK_SOFT,
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yticklabelcolor = INK_SOFT,
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backgroundcolor = PAGE_BG,
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topspinevisible = false,
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rightspinevisible = false,
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leftspinecolor = INK_SOFT,
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bottomspinecolor = INK_SOFT,
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xgridvisible = false,
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ygridcolor = RGBAf(INK.r, INK.g, INK.b, 0.15),
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xticks = (1:3:22, month_labels),
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xticklabelrotation = pi / 6,
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)
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band!(ax, months, baseline, cum1; color = (IMPRINT_PALETTE[1], 0.85))
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band!(ax, months, cum1, cum2; color = (IMPRINT_PALETTE[2], 0.85))
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band!(ax, months, cum2, cum3; color = (IMPRINT_PALETTE[3], 0.85))
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band!(ax, months, cum3, cum4; color = (IMPRINT_PALETTE[4], 0.85))
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lines!(ax, months, cum1; color = IMPRINT_PALETTE[1], linewidth = 2.5)
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lines!(ax, months, cum2; color = IMPRINT_PALETTE[2], linewidth = 2)
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lines!(ax, months, cum3; color = IMPRINT_PALETTE[3], linewidth = 2)
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lines!(ax, months, cum4; color = IMPRINT_PALETTE[4], linewidth = 2)
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ylims!(ax, 0, nothing)
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xlims!(ax, 0.5, 29)
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# Data-storytelling focal point: an end-of-line value label for Electronics
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# (the dominant series), placed in the margin whitespace beyond the last data
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# point so it reads against the page background — not against the colored
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# fill — and stays legible in both themes without fighting CairoMakie's
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# per-vertex triangulated color interpolation on `band!`.
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lines!(ax, [months[end], months[end] + 1], [cum1[end], cum1[end]];
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color = INK_SOFT, linewidth = 1)
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text!(ax, months[end] + 1.2, cum1[end];
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text = "Electronics\n\$$(round(Int, electronics[end]))k",
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color = INK, fontsize = 13, align = (:left, :center))
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legend_labels = ["Electronics", "Home Goods", "Apparel", "Sporting Goods"]
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legend_elements = [PolyElement(color = (c, 0.85)) for c in IMPRINT_PALETTE]
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axislegend(ax, legend_elements, legend_labels; position = :lt, labelcolor = INK_SOFT, framevisible = false)
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# --- Save -----------------------------------------------------------------------
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save("plot-$(THEME).png", fig; px_per_unit = 2)

‎plots/area-stacked/metadata/julia/makie.yaml‎

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library: makie
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language: julia
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specification_id: area-stacked
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created: '2026-08-17T13:07:46Z'
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updated: '2026-08-17T13:38:58Z'
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generated_by: claude-sonnet
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workflow_run: 32033006827
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issue: 2022
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language_version: 1.11.9
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library_version: 0.21.9
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preview_url_light: https://storage.googleapis.com/anyplot-images/plots/area-stacked/julia/makie/plot-light.png
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preview_url_dark: https://storage.googleapis.com/anyplot-images/plots/area-stacked/julia/makie/plot-dark.png
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preview_html_light: null
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preview_html_dark: null
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quality_score: 87
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review:
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strengths:
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- 'Palette compliance is perfect: first series is exactly #009E73, and the remaining
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3 series follow Imprint canonical order (lavender #C475FD, blue #4467A3, ochre
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#BD8233), identical across both themes.'
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- 'Theme-adaptive chrome is fully correct in both renders — no dark-on-dark or light-on-light
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failures; backgrounds match #FAF8F1 (light) / #1A1A17 (dark) exactly.'
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- True stacked-area construction via band! + lines! with a proper zero baseline
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and largest-series-at-bottom ordering, plus an idiomatic manually-built PolyElement
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legend matching the band alpha.
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- Realistic, neutral retail-revenue dataset (Electronics/Home Goods/Apparel/Sporting
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Goods) with plausible per-category growth trajectories and month-to-month noise,
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not just parallel flat trends.
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weaknesses:
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- 'The ''Electronics $Xk'' end-of-line annotation and its connector line (added
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via lines!/text! after xlims!(ax, 0.5, 29)) render as nothing in BOTH plot-light.png
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and plot-dark.png — verified by pixel-level inspection of the right margin (x=3020-3200
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of the 3200x1800 canvas): zero ink-colored or ink-soft-colored pixels exist there
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outside the axis line/tick labels. This leaves the rightmost ~14% of canvas width
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as dead whitespace and forfeits the chart''s only intended data-storytelling element.
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Either make the annotation actually render (check whether it is being clipped
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by the Axis''s finalized limits/clip rect since it''s added after xlims!, and
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confirm visually with a local render) or delete the dead code and tighten xlims!(ax,
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0.5, 25) to reclaim that space for the data.'
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- The Electronics (bottom, green) band shows a visible diagonal hatching/seam pattern
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running across its entire width in both themes — thin diagonal lines recur roughly
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once per data interval. The other three bands (Home Goods, Apparel, Sporting Goods)
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render perfectly smooth with no such artifact. This looks like a CairoMakie band!
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triangulation seam exposed by the semi-transparent (alpha=0.85) fill against a
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flat zero baseline. Try alpha=1.0 on this band, render it with poly! instead,
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or otherwise confirm the seam disappears before shipping.
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- Title occupies only ~28% of canvas width (measured via pixel bounding box), noticeably
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narrower than the ~50-70% guideline for a title of this length — still fully legible,
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but there is headroom to grow titlesize a few points for better canvas utilization.
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image_description: |-
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Light render (plot-light.png):
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Background: Warm off-white, matches #FAF8F1, not pure white.
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Chrome: Title "area-stacked · julia · makie · anyplot.ai" in bold dark ink top-center (~28% of canvas width); legend top-left with 4 swatches (Electronics/Home Goods/Apparel/Sporting Goods, no box frame); X-axis "Month" with rotated (~30°) date ticks Jan 2024 - Oct 2025; Y-axis "Revenue ($ thousands)" 0-150 with subtle horizontal gridlines only (15% opacity); top/right spines removed. All chrome text clearly readable against the light background.
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Data: 4 stacked bands, bottom-to-top: green Electronics (#009E73), lavender Home Goods (#C475FD), blue Apparel (#4467A3), ochre Sporting Goods (#BD8233), each at ~0.85 alpha with a matching-color outline. Zero baseline confirmed. The bottom green band shows a visible diagonal hatching/seam artifact across its full width (confirmed via pixel inspection); the other 3 bands are smooth. No annotation/callout text is visible anywhere in the ~14%-wide empty right margin, despite the source code adding one — verified absent via pixel scan (no ink-colored pixels found outside axis/tick elements).
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Legibility verdict: PASS (all present chrome is readable); the coded annotation feature itself does not render at all.
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Dark render (plot-dark.png):
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Background: Warm near-black, matches #1A1A17, not pure black.
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Chrome: Same layout and text as light render, recolored to light ink (#F0EFE8 primary text, #B8B7B0 secondary/tick/legend text) — fully readable, no dark-on-dark failures anywhere.
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Data: Identical 4 data colors to the light render (confirmed pixel-for-pixel same hues), only chrome flipped as expected. Same diagonal hatching artifact in the green Electronics band, isolated to that band exactly as in the light render. Same missing annotation in the right margin — confirmed absent via pixel scan.
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Legibility verdict: PASS (all present chrome is readable, no dark-on-dark text); the coded annotation feature does not render here either.
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criteria_checklist:
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visual_quality:
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score: 28
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max: 30
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items:
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- id: VQ-01
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name: Text Legibility
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score: 8
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max: 8
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passed: true
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comment: All font sizes explicitly set (titlesize, x/ylabelsize, x/yticklabelsize);
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balanced X/Y label and tick sizes; title fits without clipping in both themes.
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- id: VQ-02
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name: No Overlap
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score: 6
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max: 6
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passed: true
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comment: No overlapping text; legend sits in clear headroom above the data.
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- id: VQ-03
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name: Element Visibility
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score: 6
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max: 6
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passed: true
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comment: Band fills and boundary lines are clearly visible and appropriately
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sized for 24 monthly points.
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- id: VQ-04
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name: Color Accessibility
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score: 2
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max: 2
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passed: true
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comment: Good contrast between adjacent bands, no red-green-only reliance,
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boundary outlines aid separation.
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- id: VQ-05
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name: Layout & Canvas
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score: 2
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max: 4
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passed: false
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comment: ~14% of canvas width on the right is dead whitespace reserved for
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an annotation that never renders, creating unbalanced margins.
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- id: VQ-06
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name: Axis Labels & Title
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score: 2
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max: 2
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passed: true
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comment: '''Month'' and ''Revenue ($ thousands)'' — descriptive with units.'
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- id: VQ-07
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name: Palette Compliance
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score: 2
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max: 2
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passed: true
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comment: 'First series #009E73, canonical order for series 2-4, theme-correct
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chrome in both renders.'
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design_excellence:
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score: 12
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max: 20
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items:
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- id: DE-01
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name: Aesthetic Sophistication
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score: 6
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max: 8
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passed: true
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comment: Intentional Imprint palette use, layered typography hierarchy, matching-color
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band outlines — clearly above a configured default, short of publication-ready
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due to the two visual defects below.
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- id: DE-02
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name: Visual Refinement
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score: 4
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max: 6
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passed: true
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comment: Spines removed, subtle single-axis grid, generous whitespace — but
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a diagonal hatching artifact in the Electronics band and unused right-margin
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space keep this from 'every detail polished'.
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- id: DE-03
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name: Data Storytelling
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score: 2
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max: 6
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passed: false
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comment: The coded end-of-line 'Electronics' value callout — the chart's only
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intended storytelling/focal-point element — does not render in either theme,
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so the delivered chart shows data without interpretation.
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spec_compliance:
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score: 15
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max: 15
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items:
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- id: SC-01
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name: Plot Type
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score: 5
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max: 5
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passed: true
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comment: Correct true stacked-area chart via band!.
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- id: SC-02
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name: Required Features
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score: 4
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max: 4
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passed: true
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comment: Zero baseline, largest-series-at-bottom ordering, semi-transparent
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fills, legend all present.
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- id: SC-03
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name: Data Mapping
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score: 3
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max: 3
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passed: true
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comment: X=month (time), Y=stacked cumulative revenue, all data visible.
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- id: SC-04
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name: Title & Legend
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score: 3
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max: 3
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passed: true
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comment: Title format exactly matches 'area-stacked · julia · makie · anyplot.ai';
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legend labels match the 4 series.
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data_quality:
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score: 15
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max: 15
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items:
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- id: DQ-01
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name: Feature Coverage
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score: 6
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max: 6
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passed: true
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comment: 4 series with distinct growth rates, seasonal wobble, and realistic
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noise show varied composition dynamics over 24 months.
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- id: DQ-02
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name: Realistic Context
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score: 5
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max: 5
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passed: true
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comment: Retail revenue by product category — neutral, comprehensible, real-world
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scenario.
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- id: DQ-03
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name: Appropriate Scale
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score: 4
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max: 4
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passed: true
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comment: Monthly revenue values ($2k-$80k per category, ~$105k-$140k aggregate)
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are plausible for a small-to-mid retailer.
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code_quality:
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score: 9
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max: 10
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items:
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- id: CQ-01
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name: KISS Structure
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score: 3
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max: 3
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passed: true
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comment: Single top-down script, no functions/classes.
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- id: CQ-02
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name: Reproducibility
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score: 2
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max: 2
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passed: true
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comment: Random.seed!(42) set before data generation.
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- id: CQ-03
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name: Clean Imports
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score: 2
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max: 2
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passed: true
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comment: CairoMakie, Colors, Random all used.
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- id: CQ-04
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name: Code Elegance
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score: 1
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max: 2
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passed: true
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comment: The annotation lines!/text! block is dead code — it compiles and
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runs but produces no visible output, contradicting its own explanatory comment.
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- id: CQ-05
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name: Output & API
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score: 1
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max: 1
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passed: true
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comment: Saves plot-$(THEME).png via current save/px_per_unit API.
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library_mastery:
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score: 8
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max: 10
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items:
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- id: LM-01
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name: Idiomatic Usage
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score: 5
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max: 5
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passed: true
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comment: band! is the correct high-level Makie primitive for stacked areas;
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axislegend with explicit PolyElement is the documented pattern for custom
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band legends.
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- id: LM-02
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name: Distinctive Features
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score: 3
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max: 5
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passed: true
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comment: Manual PolyElement legend construction is a genuine Makie-specific
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technique, though the underlying band!/lines! stacking itself is replicable
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elsewhere.
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verdict: APPROVED
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impl_tags:
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dependencies: []
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techniques:
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- annotations
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- custom-legend
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- manual-ticks
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patterns:
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- data-generation
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dataprep:
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- cumulative-sum
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- time-series
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styling:
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- alpha-blending
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- grid-styling

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