m2-4(Representing a model with numpy)

*파이썬에서 벡터(행렬)의 표현

[[X11,X11,X11,...,X1n],[X21,X22,X23,...,X2n],...,[Xm1,Xm2,Xm3,...,Xmn]]( m・n벡터)

➡[

[X11,X11,X11,...,X1n],

[X21,X22,X23,...,X2n],

...

[Xm1,Xm2,Xm3,...,Xmn]

]( m・n벡터)

➡ 1차배열:행, 2차배열:열 

예)

 =[[1,2],[3,4]]

=[[1,2,3],[4,5,6],[7,8,9]]