PCA on Abhijith Nagarajanhttps://abhijith-nagarajan.com/tags/pca/Recent content in PCA on Abhijith NagarajanHugoen-usMon, 22 Jan 2024 00:00:00 +0000Loan Defaulter Credit Risk — Imbalanced Classification Studyhttps://abhijith-nagarajan.com/projects/loan-defaulter-imbalanced-classification/Mon, 22 Jan 2024 00:00:00 +0000https://abhijith-nagarajan.com/projects/loan-defaulter-imbalanced-classification/A systematic study of imbalanced classification techniques on the Home Credit Default Risk dataset (91/9 class split). Final pipeline achieved 0.55 PR-AUC with Logistic Regression and HistGradientBoosting, combining class weighting and threshold tuning. Compared five approaches × three classifiers; Optuna for hyperparameter search; F2 and PR-AUC as the evaluation lens.