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Extend trend_test8 with Category-Level Seasonality, Forecasting, and Correlation#185

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thewonderworking wants to merge 6 commits intoDataBytes-Organisation:mainfrom
thewonderworking:feature/week8-trend_test8_contd
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Extend trend_test8 with Category-Level Seasonality, Forecasting, and Correlation#185
thewonderworking wants to merge 6 commits intoDataBytes-Organisation:mainfrom
thewonderworking:feature/week8-trend_test8_contd

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Summary
This PR extends trend_test8.ipynb with additional Week 8 analysis.

Additions

  • Category-Level Seasonality Indices
  • Aggregated seasonality across categories
  • Saved CSV (category_seasonality_index.csv) and heatmap (category_seasonality_heatmap.png)

Forecast Leaderboard

  • Compared Naive, ARIMA, and ETS models at category level
  • Metrics: sMAPE and MASE
  • Saved CSV (category_forecast_leaderboard.csv) and plot (category_forecast_leaderboard.png)

Cross-Category Correlation

  • Correlation matrix between category price movements
  • Saved CSV (category_correlation_matrix.csv) and heatmap (category_correlation_heatmap.png)

Outputs

  • All results saved under:
    • Data Analysis/outputs/category_seasonality/
    • Data Analysis/outputs/category_forecast/
    • Data Analysis/outputs/correlation/

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