A range interval chart displays min-max ranges or intervals as vertical or horizontal bars/segments for each category, making it ideal for visualizing uncertainty bounds, confidence intervals, or value spreads. Unlike error bars which extend from a central data point, range intervals show the full span between two values as a filled bar or line segment, emphasizing the range itself rather than deviation from a center. This visualization excels at comparing ranges across multiple categories simultaneously.
# anyplot.ai
# range-interval: Range Interval Chart
# Library: makie 0.21.9 | Julia 1.11.9
# Quality: 94/100 | Created: 2026-09-02
using CairoMakie
using Colors
using Random
Random.seed!(42)
# --- Theme tokens -----------------------------------------------------------
const THEME = get(ENV, "ANYPLOT_THEME", "light")
const PAGE_BG = THEME == "light" ? colorant"#FAF8F1" : colorant"#1A1A17"
const INK = THEME == "light" ? colorant"#1A1A17" : colorant"#F0EFE8"
const INK_SOFT = THEME == "light" ? colorant"#4A4A44" : colorant"#B8B7B0"
const IMPRINT_PALETTE = [
colorant"#009E73", colorant"#C475FD", colorant"#4467A3", colorant"#BD8233",
colorant"#AE3030", colorant"#2ABCCD", colorant"#954477", colorant"#99B314",
]
const BRAND = IMPRINT_PALETTE[1]
# --- Data ---------------------------------------------------------------
# Annual base salary ranges by job title at a mid-size tech company (USD thousands),
# sorted by midpoint so the chart reads as a low-to-high career ladder.
job_titles = [
"Support Specialist", "QA Analyst", "Data Analyst", "Frontend Developer",
"Backend Developer", "DevOps Engineer", "Product Manager", "Data Scientist",
"Senior Engineer", "Engineering Manager", "Principal Engineer", "VP of Engineering",
]
min_salary = [42, 48, 55, 62, 68, 75, 82, 90, 105, 120, 145, 175]
max_salary = [58, 66, 76, 85, 94, 102, 118, 130, 150, 175, 205, 260]
order = sortperm(min_salary .+ max_salary)
job_titles = job_titles[order]
min_salary = Float64.(min_salary[order])
max_salary = Float64.(max_salary[order])
positions = 1:length(job_titles)
spread = max_salary .- min_salary
widest_idx = argmax(spread)
# --- Title (scales fontsize to length; 67 chars is the style-guide baseline) --
title_text = "Salary Ranges by Job Title · range-interval · julia · makie · anyplot.ai"
ratio = length(title_text) > 67 ? 67 / length(title_text) : 1.0
titlesize = max(round(Int, 20 * ratio), 13)
# --- Plot ---------------------------------------------------------------
fig = Figure(
resolution = (1600, 900),
fontsize = 14,
backgroundcolor = PAGE_BG,
)
ax = Axis(
fig[1, 1];
title = title_text,
titlesize = titlesize,
titlecolor = INK,
xlabel = "Annual Base Salary (USD thousands)",
ylabel = "Job Title",
xlabelsize = 14,
ylabelsize = 14,
xlabelcolor = INK,
ylabelcolor = INK,
xticklabelsize = 12,
yticklabelsize = 12,
xticklabelcolor = INK_SOFT,
yticklabelcolor = INK_SOFT,
xtickcolor = INK_SOFT,
ytickcolor = INK_SOFT,
yticks = (positions, job_titles),
backgroundcolor = PAGE_BG,
topspinevisible = false,
rightspinevisible = false,
leftspinecolor = INK_SOFT,
bottomspinecolor = INK_SOFT,
xgridcolor = RGBAf(INK.r, INK.g, INK.b, 0.15),
ygridvisible = false,
xautolimitmargin = (0.03, 0.22),
)
# Alternating row bands (every other category) for scan-ability across 12 rows.
band_rows = collect(positions)[2:2:end]
hspan!(ax, band_rows .- 0.5, band_rows .+ 0.5; color = (INK_SOFT, 0.07))
rangebars!(
ax, positions, min_salary, max_salary;
direction = :x,
color = (BRAND, 0.55),
whiskerwidth = 14,
linewidth = 16,
)
scatter!(ax, min_salary, positions; color = BRAND, markersize = 14, strokewidth = 1.5, strokecolor = PAGE_BG)
scatter!(ax, max_salary, positions; color = BRAND, markersize = 14, strokewidth = 1.5, strokecolor = PAGE_BG)
# Callout on the widest-range category to give readers an immediate takeaway
# beyond the sort order alone.
text!(
ax, max_salary[widest_idx] + 6, positions[widest_idx];
text = "Widest range: \$$(round(Int, spread[widest_idx]))K spread",
color = INK, fontsize = 12, align = (:left, :center),
)
# --- Save -----------------------------------------------------------------
save("plot-$(THEME).png", fig; px_per_unit = 2)
Runnable source as JSON, for any HTTP client: https://api.anyplot.ai/specs/range-interval/makie/code. Any spec id and library id listed in llms-full.txt fit the same URL shape; every URL below is complete and callable.
{
"spec_id": "range-interval",
"language": "julia",
"library": "makie",
"page": "https://anyplot.ai/range-interval/julia/makie",
"hub": "https://anyplot.ai/range-interval",
"code_json": "https://api.anyplot.ai/specs/range-interval/makie/code",
"spec_json": "https://api.anyplot.ai/specs/range-interval",
"render_light_png": "https://storage.googleapis.com/anyplot-images/plots/range-interval/julia/makie/plot-light.png",
"render_dark_png": "https://storage.googleapis.com/anyplot-images/plots/range-interval/julia/makie/plot-dark.png",
"quality_score": 94.0,
"license": "MIT",
"guide": "https://anyplot.ai/llms.txt"
}Part of Range Interval Chart on anyplot.ai.