scipy生成帕斯卡矩阵

1.源码实现

import scipy.linalg as sl

A = sl.pascal(4,'symmetric')
B = sl.pascal(4,'lower')
C = sl.pascal(4,'upper')
D = sl.pascal(3,'lower')

print(A)
print(B)
print(C)
print(D)

2.运行及其结果

python3 pascal.py 
[[ 1  1  1  1]
 [ 1  2  3  4]
 [ 1  3  6 10]
 [ 1  4 10 20]]
[[1 0 0 0]
 [1 1 0 0]
 [1 2 1 0]
 [1 3 3 1]]
[[1 1 1 1]
 [0 1 2 3]
 [0 0 1 3]
 [0 0 0 1]]
[[1 0 0]
 [1 1 0]
 [1 2 1]]