chartli

CLI for rendering charts in terminals from numeric text data. chartli turns plain numbers into terminal charts. ascii, spark, bars, columns, heatmap, unicode, braille, svg.

Install

Run instantly:

npx chartli --help

Or install globally:

pnpm add -g chartli

Quick start:

npx chartli
npx chartli --help

Usage

npx chartli [file] [options]

Usage: chartli [options] [file]

Render terminal charts from numeric data

Arguments:
  file                   Input file (reads from stdin if not provided)

Options:
  -v, --version          Output the version number
  -t, --type <type>      Chart type: svg, ascii, unicode, braille, spark, bars,
                         columns, heatmap (default: "ascii")
  -w, --width <number>   Chart width
  -h, --height <number>  Chart height
  -m, --mode <mode>      SVG mode: circles or lines (default: "circles")
  --help                 Display help for command

Types

• ascii
• spark
• bars
• columns
• heatmap
• unicode
• braille
• svg

Example data files

• examples/assets/core-single-series.txt
• examples/assets/core-multi-series.txt
• examples/assets/image-data.txt
• examples/assets/image-columns-variant.txt

Image chart set (text diagrams)

ASCII Line

pnpm chartli examples/assets/image-data.txt -t ascii -w 24 -h 8

  1.00 │                       ○
       │
       │             ◇         ◇
       │                  ◆    ●
  0.50 │                  ●    ◆
       │    ◇    ◆   ●
       │         ○   ◆
  0.00 │◇   ◆    ◇        ◇
       └────────────────────────

Sparklines

pnpm chartli examples/assets/image-data.txt -t spark

S1 ▁▂▃▄▅▆
S2 ▁▄▂▇▅█
S3 ▁▂▄▃▆▅
S4 ▁▄▂▇▂▇

Horizontal Bars

pnpm chartli examples/assets/image-data.txt -t bars -w 28

S1 |███████████████████         | 0.67
S2 |▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓| 1.00
S3 |▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒             | 0.53
S4 |░░░░░░░░░░░░░░░░░░░░░░░     | 0.83

Columns

pnpm chartli examples/assets/image-data.txt -t columns -h 8

  ▓
  ▓   ░
  ▓   ░
█ ▓   ░
█ ▓ ▒ ░
█ ▓ ▒ ░
█ ▓ ▒ ░
█ ▓ ▒ ░
───────
1 2 3 4

Columns (Variant)

pnpm chartli examples/assets/image-columns-variant.txt -t columns -h 8

  ▓   ░
█ ▓   ░
█ ▓   ░
█ ▓ ▒ ░
█ ▓ ▒ ░
█ ▓ ▒ ░
───────
1 2 3 4

Heatmap

pnpm chartli examples/assets/image-data.txt -t heatmap

    C1 C2 C3 C4
R01
R02 ░ ▒ ░ ▒
R03 ░ ░ ▒ ░
R04 ▒ ▓ ░ ▓
R05 ▒ ▒ ▓ ░
R06 ▓ █ ▒ ▓

Unicode Bars

pnpm chartli examples/assets/image-data.txt -t unicode

             █
           ▃ █             ▅ ▅
     ▃     █ █      ▃      █ █
    ▂█     █▆█      █▂     █ █
   ▂██   ▂ ███    ▂ ██   ▃ █ █
  ▁███   █ ███    █▁██   █ █ █
 ▁████   █▅███   ▁████   █▁█▁█
 █████   █████   █████   █████

Braille

pnpm chartli examples/assets/image-data.txt -t braille -w 16 -h 6

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡀⠀⠀⠈
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠄⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀
⡀⠀⠀⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
...

SVG Chart

pnpm chartli examples/assets/image-data.txt -t svg -m lines -w 320 -h 120 | sed -n '/^<?xml/,$p' > examples/assets/output/image-chart.svg

<?xml version='1.0'?>
<svg xmlns='http://www.w3.org/2000/svg' width='650' height='120' version='1.1'>
  <polyline ... />
  <polyline ... />
  <polyline ... />
  <polyline ... />
</svg>

Examples

All examples are data-file driven from examples/assets/.

Data files

• examples/assets/core-single-series.txt
• examples/assets/core-multi-series.txt
• examples/assets/image-data.txt
• examples/assets/image-columns-variant.txt
• examples/assets/output/

Core commands

• pnpm chartli examples/assets/core-single-series.txt -t ascii -w 24 -h 8
• pnpm chartli examples/assets/core-multi-series.txt -t spark
• pnpm chartli examples/assets/core-multi-series.txt -t bars -w 28
• pnpm chartli examples/assets/core-multi-series.txt -t columns -h 8
• pnpm chartli examples/assets/core-multi-series.txt -t heatmap
• pnpm chartli examples/assets/core-multi-series.txt -t unicode
• pnpm chartli examples/assets/core-single-series.txt -t braille -w 16 -h 6
• pnpm chartli examples/assets/core-multi-series.txt -t svg -m lines -w 320 -h 120 | sed -n '/^<?xml/,$p' > examples/assets/output/core-chart.svg

Image commands

• pnpm chartli examples/assets/image-data.txt -t ascii -w 24 -h 8
• pnpm chartli examples/assets/image-data.txt -t spark
• pnpm chartli examples/assets/image-data.txt -t bars -w 28
• pnpm chartli examples/assets/image-data.txt -t columns -h 8
• pnpm chartli examples/assets/image-columns-variant.txt -t columns -h 8
• pnpm chartli examples/assets/image-data.txt -t heatmap
• pnpm chartli examples/assets/image-data.txt -t unicode
• pnpm chartli examples/assets/image-data.txt -t braille -w 16 -h 6
• pnpm chartli examples/assets/image-data.txt -t svg -m lines -w 320 -h 120 | sed -n '/^<?xml/,$p' > examples/assets/output/image-chart.svg

Run grouped examples

• pnpm run example:kitchen-sink
• pnpm run example:image-set:kitchen-sink
• pnpm run example:all-kitchen-sink

Run all examples

Image-set chart run:

pnpm run example:image-set:kitchen-sink

Core + image run:

pnpm run example:all-kitchen-sink

Agent skill install

Install the repository skill for agents:

npx skills add ahmadawais/chartli

License

Apache-2.0 by Ahmad Awais built with Command Code.