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[box-basic] altair implementation #242
Description
Activity
- added a parent issue
on Dec 6, 2025 Attempt 1/3
Technical Approach
- Imports:
import altair as alt, import numpy as np, import pandas as pd - Plot function:
alt.Chart
Status
- PR: feat(altair): implement box-basic #349
- File:
plots/altair/boxplot/box-basic/default.py - Workflow: 19995639100
- Imports:
🧪 Test Results (PR #349)
Python:
📊 Plot Preview (Python 3.13)
altair (default) - UPDATE
Before After View version history (4 versions)
🤖 Generated by gen-preview workflow
AI Review - Attempt 1/3
Quality Evaluation
Evaluator Score Verdict Claude 92/100 approve Criteria Checklist
Visual Quality
- VQ-001: Axes labeled correctly (X: "Group", Y: "Value" - meaningful labels)
- VQ-002: Visual clarity (Grid is subtle with dashed lines, opacity=0.3)
- VQ-003: Elements clear (Boxes clearly visible with appropriate opacity=0.7, outliers marked)
- VQ-004: No overlap (Labels, ticks all readable, no overlap)
- VQ-005: Legend present (N/A - legend hidden as x-axis already shows groups, appropriate choice)
- VQ-006: Colorblind safe (Uses 'set2' color scheme which is colorblind friendly)
- VQ-007: Image size (5004 × 2955 px - close to target 4800 × 2700, acceptable)
- VQ-008: Title (Present: "Basic Box Plot", centered)
Code Quality
- CQ-001: Type hints present (Optional, Chart return type, TYPE_CHECKING)
- CQ-002: Docstring complete (Google-style with Args, Returns, Raises, Example)
- CQ-003: Input validation (Empty data check, column existence validation)
- CQ-004: Clear error messages (Shows available columns on KeyError)
- CQ-005: No magic numbers (Parameters have defaults in function signature)
Correctness
- CR-001: Data accurate (Correct columns used for x/y encoding)
- CR-002: Spec compliance (Box plot with quartiles, whiskers at 1.5×IQR, outliers shown)
- CR-003: Edge cases (Empty data raises ValueError, missing columns raise KeyError)
Issues Found
None - Implementation meets all quality criteria.
Positive Highlights
- Excellent tooltips: Shows count, min, Q1, median, Q3, max on hover
- Smart label rotation: Auto-rotates labels at 45° when >5 groups
- Sample size annotations: Text annotations showing count per group
- Proper Altair patterns: Uses mark_boxplot() as specified in library guide
- Configurable: All visual aspects parameterized (color scheme, dimensions, labels)
AI Feedback for Next Attempt
No changes needed - implementation is production ready.
Verdict: APPROVED
- added a commit that references this issue
on Dec 7, 2025 Merged
altair implementation for
box-basichas been merged!
🚀 Auto-merged by pyplots CI
[box-basic] altair Implementation
Parent Issue: #203
Spec:
specs/box-basic.mdLibrary: altair
Feature Branch:
plot/box-basicAttempt History
Attempts will be documented below as comments.