How to get the corresponding logic value based on the sum of vector elements
조회 수: 1 (최근 30일)
이전 댓글 표시
I have a vector which is [1,1,2,3,5]; I want to loop through all the elements in the vector to check whether the sum of each elements is equal to my input. After that put the corresponfding index of the possible answer as a reference to a new vector which retrun the logic value. For example, if the inout is 6, the corresponding logic value suppose to be [1,0,0,0,1] or anyother combination. The problem is if the value is bigger than 8 it need the sum of 3 elements in vector. How I can get the same answer when the input need three elements add together?
댓글 수: 0
채택된 답변
Andrei Bobrov
2019년 5월 14일
A = [1,1,2,3,5];
my_input = 5;
out = [];
n = numel(A);
ii = 1:n;
for jj = 1:n
k = nchoosek(ii,jj);
r = sum(reshape(A(k),size(k)),2);
lo = r == my_input;
if any(lo)
p = k(lo,:);
m = size(p,1);
out = [out;accumarray([repmat(1:m,jj,1),p(:)],1,[m,n])];
end
end
댓글 수: 3
Andrei Bobrov
2019년 5월 15일
편집: Andrei Bobrov
2019년 5월 15일
nchoosek(v,k) - returns a matrix containing all possible combinations of the elements of vector v taken k at a time.
reshape(A,sz) - reshapes A using the size vector, sz, to define size(B). For example, reshape(A,[2,3]) reshapes A into a 2-by-3 matrix. sz must contain at least 2 elements, and prod(sz) must be the same as numel(A).
Row
r = sum(reshape(A(k),size(k)),2);
we can change on block:
if jj == n
AA = Ak(k).';
else
AA = Ak(k);
end
r = sum(AA,2);
here
Ak = A(:);
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrices and Arrays에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!