Construct a permutation matrix from two vectors

2023 3 23
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更新时间：2023 3 23
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Hi,
If I have two vectors:
a = [1 ; 2 ; 3];
b = [4 ; 5 ; 6];
How can I constrcut a matrix that has the shape of:
Thanks.

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 采纳的回答

Matt J
Matt J 2023-3-23
编辑：Matt J 2023-3-23
Ran in:

0 个投票

Ran in:
a = [1 ; 2 ; 3];
b = [4 ; 5 ; 6];
[B,A]=ndgrid(b,a);
c=[A(:),B(:)]
c = 9×2
1 4 1 5 1 6 2 4 2 5 2 6 3 4 3 5 3 6

更多回答（1 个）

Bruno Luong
Bruno Luong 2023-3-23
编辑：Bruno Luong 2023-3-23
Ran in:

1 个投票

Ran in:
combinations, new stock function in R2023a
a = [1 ; 2 ; 3];
b = [4 ; 5 ; 6];
combinations(a,b)
ans = 9×2 table
a b _ _ 1 4 1 5 1 6 2 4 2 5 2 6 3 4 3 5 3 6

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