如何计算直方图的平均值和标准差

简介：Wang Tao is a Zhongshan wolf kind of person. When he returns to his own forest and mountains, his courage will return. Once he leaves his own territory, he is like a prodigal dog. He does not dare to speak loudly. He calls himself a hero, but in fact he is just a countryman. I don’t know how many people want the son of a bitch to die early and be born early.