Suppose i have a 1000*24 binary vectors each having 4 ones and 20 zeros in each row .Now want to extract the spcific vectors that have ones only at the speific positions.

Question

Muhammad 2022-10-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1819550-suppose-i-have-a-1000-24-binary-vectors-each-having-4-ones-and-20-zeros-in-each-row-now-want-to-ext

评论： dpb 2022-10-12

采纳的回答： dpb

在 MATLAB Online 中打开

For example

I have all stored all these vectors in a matrix

AA=[ 0     0     1     0     0     0     0     0     1     0     0     1     0     0     0     0     1     0     0     0     0     0     0     0
   0     0     0     0     0     0     1     1     0     0     0     1     0     0     1     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     0     0     1     1     0     0     0     0     0     0     1     0     1     0     0     0     0
   0     0     0     1     0     0     1     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     0     0     0     1     1     1     0     0     0     0     0     0     0     0     0     0     0
   0     1     0     0     1     1     0     0     0     0     0     0     0     0     0     0     0     0     0     1     0     0     0
   1     0     0     1     0     0     0     0     0     0     0     0     0     0     1     0     1     0     0     0     0     0     0
   0     1     0     0     0     1     0     0     0     0     0     1     0     0     0     0     0     1     0     0     0     0     0
   0     0     0     0     0     0     1     0     0     0     0     1     0     0     1     0     0     0     1     0     0     0     0
   0     0     0     0     1     0     0     0     0     0     1     0     0     0     0     0     1     0     0     0     0     1     0
   0     0     0     0     1     0     0     0     0     0     0     0     0     0     1     0     1     0     0     0     1     0     0
   1     1     0     1     0     0     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     0     0     0     1     0     0     1     0     0     1     0     0     0     0     0     1     0
   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     1     0     1     0     0     1     1     0
   0     0     0     1     0     0     0     0     1     1     0     0     0     0     1     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     1     0     1     0     0     1     0     1     0     0     0     0     0     0     0     0     0
   0     0     0     0     1     0     0     0     1     0     1     0     1     0     0     0     0     0     0     0     0     0     0
   1     0     0     0     0     1     0     0     0     1     0     0     0     0     0     0     0     0     1     0     0     0     0
   0     0     0     0     1     0     1     0     0     0     0     1     0     0     0     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     0     1     0     0     0     0     0     0     0     0     0     1     1     1     0     0     0
   0     0     1     0     0     0     0     0     0     0     0     0     0     1     0     0     0     1     0     0     0     1     0
   0     0     0     1     0     0     0     0     1     0     0     0     0     0     0     0     1     0     0     0     0     0     1
   0     0     0     0     0     0     0     0     0     0     0     0     1     0     0     0     0     1     1     0     0     1     0
   0     1     0     1     0     0     0     0     0     1     0     0     0     0     0     1     0     0     0     0     0     0     0
   0     1     0     0     0     0     0     1     0     0     1     0     1     0     0     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     1     0     0     0     1     0     0     0     0     0     0     0     0     1     0     0     0];

Now i want only those vectors and their indexes (of vectors) that have ones at the positions 12,13,14,15 and taht have ones at the positions 14,15,16 and 17 and want them to be stored separtely in another matrix.

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Answer 1

dpb 2022-10-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1819550-suppose-i-have-a-1000-24-binary-vectors-each-having-4-ones-and-20-zeros-in-each-row-now-want-to-ext#answer_1068925

在 MATLAB Online 中打开

Is that two separate cases of 12:15 AND 14:17 or one case that includes both cases? And is it all or any that must be 1?

V1=12:15;           % the first search vector
ix1=all(A(:,V1),2); % the logical vector if it is "all"  
M1=A(ix1,:);        % the subset array
I1=find(ix1);       % the numeric indices of M1 rows in the original A

Shouldn't be hard to generalize; if the need is for any one element instead of all, then simply replace all with any above.

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Muhammad 2022-10-12

Thank you so much for your quick response.

it helped alot thanks again.

dpb 2022-10-12

Glad to help -- when know what the problem is, it's easier... <VBG>

So if this solved the problem or gave you the tools with which to answer, go ahead and Accept the Answer. Let's others know resolution has been reached if nothing else...

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