11  Ranking

Bar charts and their variants — comparing quantities across categories.

(ns napkinsketch-book.ranking
  (:require
   ;; Shared datasets for these docs
   [napkinsketch-book.datasets :as data]
   ;; Kindly — notebook rendering protocol
   [scicloj.kindly.v4.kind :as kind]
   ;; Napkinsketch — composable plotting
   [scicloj.napkinsketch.api :as sk]))

(def sales {:product [:widget :gadget :gizmo :doohickey]
            :revenue [120 340 210 95]})

Bar Chart

Count occurrences of a categorical column.

(-> data/iris
    (sk/lay-bar :species))

Colored Bar Chart

Grouped (dodged) bars — count by day, colored by smoking status.

(-> data/tips
    (sk/lay-bar :day {:color :smoker}))

Stacked Bar Chart

Same data, stacked instead of dodged.

(-> data/tips
    (sk/lay-stacked-bar :day {:color :smoker}))

Stacked Bar (Proportions)

100% stacked bars — shows proportions instead of counts.

(-> data/penguins
    (sk/lay-stacked-bar-fill :island {:color :species}))

Horizontal Bar Chart

Flip the bar chart for horizontal orientation.

(-> data/iris
    (sk/lay-bar :species)
    (sk/coord :flip))

Horizontal Colored Bars

Colored bars, flipped.

(-> data/tips
    (sk/lay-bar :day {:color :time})
    (sk/coord :flip))

Value Bar

Pre-computed y values (no counting).

(-> sales
    (sk/lay-value-bar :product :revenue))

Value Bar (Horizontal)

Flip for horizontal orientation.

(-> sales
    (sk/lay-value-bar :product :revenue)
    (sk/coord :flip))

Lollipop

Stem + dot — a lighter alternative to bar charts.

(-> sales
    (sk/lay-lollipop :product :revenue))

Lollipop (Horizontal)

Flipped for horizontal orientation.

(-> sales
    (sk/lay-lollipop :product :revenue)
    (sk/coord :flip))

What’s Next

• Change over Time — line charts, step functions, and stacked areas
• Configuration — control dimensions, palettes, and themes

source: notebooks/napkinsketch_book/ranking.clj