Ｎｕｍｐｙ笔记
Numpy日常记录
１．xx,yy = np.mgrid[-3:3:.01, -3:3:.01] # np.mgrid[] 返回多维结构
mgrid:绘制三维图标经常用到
np.mgrid[１:3:３j, 4:6:3j] j貌似是0.5
2.np.c_[xx.ravel(), yy.ravel()] # ravel()将多维数组降为一维
np.r_是按行连接两个矩阵 np.c_是按列连接两个矩阵
import numpy as np
xx = np.mgrid[-3:3:1]
yy = np.mgrid[2:8:1]
print(xx.ravel())
print(yy.ravel())
print('按照列拼接:\n',np.c_[xx.ravel(), yy.ravel()])
print('按照行拼接:\n', np.r_[xx.ravel(), yy.ravel()])
执行结果如下：