pandas+matploblib画图 叠加两张图: https://blog.csdn.net/o1101574955/article/details/51623018?_t=t 如何判断是否正态分布: http://data.library.virginia.edu/understanding-q-q-plots/ https://en.wikipedia.org/wiki/Kolmogorov%E2%80%93Smirnov_test