/* Principal Components Analysis or the Karhunen-Loeve expansion is a classical method for dimensionality reduction or exploratory data analysis. One reference among many is: F. Murtagh and A. Heck, Multivariate Data Analysis, Kluwer Academi

Clustering is the unsupervised classification of patterns (observations, data items, or feature vectors) into groups (clusters). The clustering problem has been addressed in many contexts and by researchers in many disciplines this reflects its

本文主要讲述的是地统计分析，包括地统计基础、探索性数据分析、空间确定性插值。-This article is about to statistical analysis, including in statistical base, exploratory data analysis, spatial interpolation uncertainty.