chartjs/Chart.js

[FEATURE] Histograms

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#3,900 opened on Feb 12, 2017

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 (33 comments) (40 reactions) (0 assignees)JavaScript (67,416 stars) (11,951 forks)batch import
help wantedtype: enhancement

Description

A nice feature would be to support histogram charts, or alternatively, update the bar chart so that a histogram can be manually created given the right data. At the moment it seems like a bar chart only can represent value-category pairs, while a histogram would require the bars to be drawn at the right positions on a numerical/linear axis.

Contributor guide

Tech stack
javascripthtmlcss
Domain
frontenddata
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Chart.js basicshistogram understandingJavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Examine the existing bar chart implementation in Chart.js (likely in src/elements and src/controllers). Understand how axes handle numerical vs categorical data. Review discussions in this issue for desired behavior and any community attempts. Focus on modifying the bar chart controller to support automatic binning and positioning on a linear axis, or create a new histogram chart type.