Feature/issue 43 logistic regression #47
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Issue: #43 - Added Logistic Regression interface with binary and multiclass support - Added support for GD and Newton optimization methods - Added L2 regularization support - Added comprehensive test suite covering: - Binary and multiclass classification - Regularization effects - Different optimization methods - Convergence behavior
Issue: #43 - Implemented binary and multiclass classification - Added L2 regularization support - Implemented both Gradient Descent and Newton optimization - Added probability estimation with softmax - Added cross-entropy loss calculation
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