计算两点间的最短距离，从而得到最短路径，广泛应用与数学建模。-Calculate the shortest distance between two points, the shortest path, and wider use of mathematical modeling.

聚类算法综述,分层次聚类法（最短距离法),最简单的聚类方法.-Summary of clustering algorithm, hierarchical clustering method (the shortest distance method), the simplest method of clustering.