如何在sympy中创建符号变量的向量?我想做点什么
x, x1, x2, x3 = symbols ('x x1 x2 x3')
A = [x+x1,x+x2,x+x3]
B = A * Transpose(A)
print (B)
A
是符号变量数组 . 我查看了同情documentation,但无法弄清楚 .
(Python 2.7.6,sympy 0.7.4.1)
更新:
我想做点什么
x, x1, x2, x3 = symbols ('x x1 x2 x3')
v1e = x+x1
v2e = x+x2
v3e = x+x3
v1 = v1e.subs(x1,1)
v2 = v2e.subs(x2,2)
v3 = v3e.subs(x3,3)
A = Matrix ([v1,v2,v3])
B = A * Transpose(A)
print (B)
但似乎 v1,..
作为矩阵元素存在问题 . 有什么建议?
1 回答
向量可以表示为
Matrix
es,作为列向量或行向量 .