User:ZiyueYao/sandbox

Key Properties:

A kernel K is a function K that satisfy several following conditions

(1) K is a probability density. K(u)≥0 and ʃ

1. Key properties are lacked like: probability density, symmetric around zero, and K(u)=0 for |u|>1.

2. More mathematical formulas of kernel and figures can be included for simplicity in later examples: Epanechnikov kernel of K(u)=3/4(1-u^2), triweight kernel and normal kernel.

3. The construction of kernel density estimate fn,h can be added into it."

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