# topfunky/gruff

Gruff graphing library for Ruby

Repository: https://github.com/topfunky/gruff
Canonical: https://ross.abutalabs.com/products/gruff
Homepage: http://gruff.rubyforge.org
Language: Ruby
License: MIT
License Family: permissive
Last push: 2026-07-28T01:14:11+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 94, release rhythm 35, longevity 100
- inputs: {"age_days": 6749, "days_push": 37, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1398, forks 240 (observed 2026-08-28T04:04:36.877638+00:00)

## What it is
Gruff is a Ruby library for generating beautiful graphs and charts as images, built on top of RMagick/ImageMagick. It supports many chart types including line, bar, pie, area, scatter, and dot charts.

## Use cases
- generate charts in ruby
- create line and bar graphs from data
- render pie charts as png images
- add graphs to a rails app
- plot data series to image files

## When to choose
- you need static chart images generated server-side in Ruby
- you want a simple, mature Ruby graphing gem with many chart types

## When to avoid
- you need interactive browser-based charts (use a JavaScript charting library)
- you cannot install ImageMagick system dependencies
- you need SVG output

## Facets
- artifact type: library
- maturity: active
- function: data-visualization, charts, image-processing
- domain: data-visualization, graphics
- platform: ruby, cross-platform
- tags: graphing, rmagick, image-generation, charts, ruby

## Member repositories
- topfunky/gruff (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:36.877638+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:39:15.014295+00:00, confidence not recorded.
  - readme: https://github.com/topfunky/gruff (fetched 2026-08-28T04:04:36.877638+00:00, sha 11300965f1e3)
- Data as of 2026-08-30T08:39:29.467469+00:00.