[bar-basic] Basic Bar Chart

[MarkusNeusinger]

A vertical bar chart comparing values across categories. Essential for categorical data comparison.

[claude]

✅ Spec ID: bar-basic

Rationale: Classic vertical bar chart for comparing values across categories - a fundamental visualization type that belongs in any plotting library collection. No duplicates found (plots directory is empty).

Add label approved to begin generation.

[github-actions]

✅ Specification Ready: bar-basic

PR: #614

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specification.md

bar-basic: Basic Bar Chart

Description

A vertical bar chart that displays categorical data with rectangular bars whose heights are proportional to the values they represent. This fundamental visualization is ideal for comparing discrete categories and identifying which categories have the highest or lowest values. Bar charts excel at showing rankings, distributions across categories, and making relative comparisons intuitive.

Applications

• Comparing quarterly sales figures across different product lines
• Visualizing survey responses showing preference counts for different options
• Displaying population statistics across different age groups or regions

Data

• category (categorical) - Labels for each bar on the x-axis
• value (numeric) - Heights of the bars representing the measured quantity
• Size: 3-15 categories recommended for readability
• Example: Product sales by category, survey response counts, performance metrics by department

Notes

• Bar widths should be consistent across all categories
• Consider adding value labels on or above bars for precise reading
• Use a single color for all bars, or highlight specific bars to draw attention
• Ensure adequate spacing between bars for visual clarity

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Next: Add approved label to merge this specification to main.

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