在Matlab中创建所有可能的行组合 [英] Creating all possible combination of rows in matlab

问题描述

我有一个9x10000大小的矩阵.

I have a matrix which is 9x10000 size.

所以行是R1，R2到R9.

So rows are R1, R2, upto R9.

我想生成所有可能的行组合，例如[R1; R2] [R1; R3] .. [R1; R9][R1; R2; R3] ... [R1; R2; R4] ... [R1; R2:R3; R4; .. R8]

I want to generate all possible combination of the rows such as [R1;R2] [R1;R3].. [R1;R9] [R1;R2;R3]...[R1;R2;R4]... [R1;R2:R3;R4;..R8]

我目前正在使用for循环.

I am currently doing this using for loops.

有没有更好的方法呢?

推荐答案

基本上，将二进制数从1计数到2 ^ 9-i表示需要选择哪些行:

Basically, counting up the binary from 1 to 2^9-i indicates which rows need to be selected:

M=... your matrix
S=dec2bin(1:2^size(M,1)-1)=='1';
allSubsets=cell(size(S,1),1);
for ix=1:size(S,1)
    allSubsets{ix}=M(find(S(ix,:)),:);
end

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