Tue May 20 22:25:36 2025

vstack_test():
  python version: 3.10.12
  numpy version:  1.26.4
  np.vstack() vertically stacks arrays of same column dimension.

  Matrix A:

  Col:       0        1        2  
  Row
    0:      11       12       13  
    1:      21       22       23  
    2:      31       32       33  
    3:      41       42       43  

  Matrix B:

  Col:       0        1        2  
  Row
    0:     501      502      503  
    1:     601      602      603  

  Matrix vstack(A,B)

  Col:       0        1        2  
  Row
    0:      11       12       13  
    1:      21       22       23  
    2:      31       32       33  
    3:      41       42       43  
    4:     501      502      503  
    5:     601      602      603  

  Matrix vstack(A[0:2,:],B,A{2:4,:])

  Col:       0        1        2  
  Row
    0:      11       12       13  
    1:      21       22       23  
    2:     501      502      503  
    3:     601      602      603  
    4:      31       32       33  
    5:      41       42       43  

vstack_test():
  Normal end of execution.
Tue May 20 22:25:36 2025