python怎么合并矩阵

1、给出两个5*6的矩阵：# -*- coding: utf-8 -*-import numpy as npa = np.arange(30).reshape(5,-1)b = np.arange(-10,20).reshape(5,-1)

3、按行合并还可以写为：c = np.vstack((a,b))

5、给出四幅大小相同的图片。

6、加载这四幅图片：# -*- coding: utf-8 -*-import numpy as npimport cv2imgs = []for i in ['a','b','c','d']: a = cv2.imread(i+'.png') imgs.append(a)p,q,r,s = imgs

7、p和q横向合并：b = np.hstack((p,q))

9、b和c纵向合并：d = np.vstack((b,c))