Xuefeng Xu
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Data Science (1)
Numerical (2)
Python (3)
Statistics (1)

How to Compute Variance?

Numerical
Python

Mathematically equivalent formulas for variance can have very different numerical stability.

Oct 3, 2025
5 min

ROC and PR Curves

Data Science
Python

ROC and PR curves are graphical tools for evaluating classification models, highlighting trade-offs in model performance.

Jul 31, 2025
8 min

Power Transform

Numerical
Python

Box-Cox and Yeo-Johnson are power transformations that normalize data but require careful handling to avoid numerical instability.

Apr 14, 2025
11 min

Monotone Piecewise Cubic Interpolation

Statistics

PCHIP is a cubic interpolation method that preserves monotonicity by computing shape-preserving derivatives to avoid overshoots.

Mar 13, 2025
3 min
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