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[line-basic] matplotlib implementation #218
Description
Activity
- added a parent issue
on Dec 6, 2025 Attempt 1/3
Technical Approach
- Imports:
import matplotlib.pyplot as plt, import pandas as pd - Plot function:
ax.plot - Config: figsize=16, 9, color=#306998
Status
- PR: feat(matplotlib): implement line-basic #287
- File:
plots/matplotlib/plot/line-basic/default.py - Workflow: 19995639040
- Imports:
🧪 Test Results (PR #287)
Python:
📊 Plot Preview (Python 3.13)
matplotlib (default) - UPDATE
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🧪 Test Results (PR #287)
Python:
📊 Plot Preview (Python 3.13)
matplotlib (default) - UPDATE
Before After View version history (8 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 - "Time" and "Value" are meaningful labels
- VQ-002: Visual clarity - Grid is subtle with alpha=0.3, doesn't dominate data
- VQ-003: Elements clear - Line and markers clearly visible with good contrast
- VQ-004: No overlap - Labels, ticks, and title are well-positioned
- VQ-005: Legend present - N/A (single series, no legend needed)
- VQ-006: Colorblind safe - Uses steelblue, a safe color choice
- VQ-007: Image size - 16:9 aspect ratio maintained (4800x2700 at 300dpi)
- VQ-008: Title - "Basic Line Plot" is centered and clear
Code Quality
- CQ-001: Type hints - Present for all parameters and return type
- CQ-002: Docstring - Complete Google-style with Args, Returns, Raises, Example
- CQ-003: Input validation - Validates empty data, missing columns, non-numeric y
- CQ-004: Clear error messages - Includes available columns in KeyError
- CQ-005: No magic numbers - All values parameterized with sensible defaults
Correctness
- CR-001: Data accurate - Correct columns used, no X/Y confusion
- CR-002: Spec compliance - All required functionality implemented
- CR-003: Edge cases - Empty data and missing columns handled
Library Guidelines
- Uses Axes methods (
ax.plot()) not pyplot functions - Correct figure creation with
plt.subplots() - Proper save with
plt.savefig()andbbox_inches='tight'
Issues Found
None - implementation is high quality.
Minor Observations (not affecting score)
- The
__main__block uses different sample data than the spec example (months vs sequential numbers), but this is acceptable as it demonstrates realistic usage
Scoring Breakdown
Base: 50 +10 (VQ-001: axes labeled) +5 (VQ-002: visual clarity) +8 (VQ-003: elements clear) +9 (VQ-004: no overlap) +0 (VQ-005: legend N/A) +6 (VQ-006: colorblind safe) +4 (VQ-007: image size) +3 (VQ-008: title) +7 (CQ-001: type hints) +8 (CQ-002: docstring) +10 (CQ-003: input validation) +6 (CQ-004: error messages) +4 (CQ-005: no magic numbers) +10 (CR-001: data accurate) +10 (CR-002: spec compliance) +5 (CR-003: edge cases) = 145 → clamped to 100, adjusted to 92 for minor style preferencesAI Feedback for Next Attempt
No changes needed - implementation meets all quality criteria.
Verdict: APPROVED
- added a commit that references this issue
on Dec 6, 2025 Merged
matplotlib implementation for
line-basichas been merged!
🚀 Auto-merged by pyplots CI
[line-basic] matplotlib Implementation
Parent Issue: #205
Spec:
specs/line-basic.mdLibrary: matplotlib
Feature Branch:
plot/line-basicAttempt History
Attempts will be documented below as comments.