The use of np.r_ and np.c_

Rules：

1.np.r_：expand the size of rows,r is row；

require two matrix has the same size of columns

2.np.c_：expand the size of columns,c is columns；

require two matrix has the same size of rows

examples are as follows

1.np.c_

1.1 code

1.2 view variables

2.np.r_

2.1 code

2.2 view the variable