feat(plotly): implement heatmap-correlation#62
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Add correlation matrix heatmap implementation for plotly library - Creates interactive heatmap with hover tooltips - Shows correlation values in cells with configurable formatting - Supports upper triangle masking option - Uses RdBu colorscale by default for clear positive/negative distinction - Includes proper input validation for numeric columns Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
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Summary
Implements
heatmap-correlationfor plotly library.Parent Issue: #53
Sub-Issue: #56
Attempt: 1/3
Implementation
plots/plotly/heatmap/heatmap-correlation/default.pyFeatures
Quality Check
✅ Axes labeled (no explicit x/y labels needed for correlation matrix)
✅ Grid subtle (plotly_white template)
✅ Elements clear (correlation values displayed)
✅ No overlap (angled x-axis labels)
✅ Legend present (color bar shows correlation scale)
✅ Colorblind safe (RdBu colorscale)
✅ Figure size (configurable, defaults to 1000x800px)
✅ Type hints and docstring included
✅ Input validation implemented
✅ Clear error messages
Test Result
Successfully generated plot.png with sample weather data correlation matrix.