PCA简单实现，自己引用数据，能出两个基本指标图-PCA simple implementation code, their own reference data, to a data map, Q statistics and T2 statistic diagram

对给定的一组数据点采用k均值进行划分，并用散点图表示了出来-A set of data points in a given using k-means partition, and a scatter diagram

斯坦福大学的node2vec模型，做图嵌入的，说明很详细分享一下，，原文件是Python2做的，我改的Python3的，分享一下(The node2vec model of Stanford University is embedded in the diagram, and the descr iption is shared in detail. The original file is made by Python 2, and my modified version of Python