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[line-basic] letsplot implementation #266
Description
Activity
- added a parent issue
on Dec 6, 2025 Attempt 1/3
Technical Approach
- Imports:
import pandas as pd, from lets_plot import ( - Plot function:
ggplot - Config: color=#306998
Status
- PR: feat(letsplot): implement line-basic #307
- File:
plots/letsplot/line/line-basic/default.py - Workflow: 19995639040
- Imports:
🧪 Test Results (PR #307)
Python:
📊 Plot Preview (Python 3.13)
letsplot (default) - UPDATE
Before After View version history (3 versions)
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🧪 Test Results (PR #307)
Python:
📊 Plot Preview (Python 3.13)
letsplot (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 (+10) - X-axis labeled "Time", Y-axis labeled "Value"
- VQ-002: Visual clarity (+5) - Grid is subtle with light gray colors (#CCCCCC, #EEEEEE)
- VQ-003: Elements clear (+8) - Line is clearly visible with appropriate width and color
- VQ-004: No overlap (+9) - No overlapping labels or text, all elements readable
- VQ-005: Legend present (+7) - N/A for single series (correctly omitted)
- VQ-006: Colorblind safe (+6) - Uses Python Blue (#306998), no red-green issues
- VQ-007: Image size (+4) - Correctly uses ggsize(1600, 900) with scale=3 for 4800x2700
- VQ-008: Title (+3) - "Basic Line Plot" is centered and clear
Code Quality
- CQ-001: Type hints (+7) - Full type hints on all parameters including
tuple[float, float],str | None - CQ-002: Docstring (+8) - Complete Google-style docstring with Args, Returns, Raises, Example
- CQ-003: Input validation (+10) - Validates empty data and missing columns
- CQ-004: Clear error messages (+6) - Shows available columns on KeyError
- CQ-005: No magic numbers (+4) - All values are parameters with defaults
Correctness
- CR-001: Data accurate (+10) - Correct column mapping for x and y
- CR-002: Spec compliance (+10) - Implements basic line plot as specified with trend visualization
- CR-003: Edge cases (+5) - Handles empty data and missing columns
Issues Found
None - implementation meets all quality criteria.
Positive Highlights
- Excellent code structure: Clean separation with proper function, full type hints, and comprehensive docstring
- Library best practices: Correctly uses
LetsPlot.setup_html(),ggsize(), andggsave()with scale=3 - Thoughtful extras: Includes linestyle mapping, marker support, and data sorting by x-axis
- Visual quality: Clean minimal theme with subtle grid, appropriate font sizes, and professional appearance
- Spec alignment: Data matches spec example pattern (time/value), properly shows trend over continuous axis
AI Feedback for Next Attempt
No changes needed - implementation is excellent.
Verdict: APPROVED
- added a commit that references this issue
on Dec 6, 2025 Merged
letsplot implementation for
line-basichas been merged!
🚀 Auto-merged by pyplots CI
[line-basic] letsplot Implementation
Parent Issue: #205
Spec:
specs/line-basic.mdLibrary: letsplot
Feature Branch:
plot/line-basicAttempt History
Attempts will be documented below as comments.