How expand a matrix?
2 次查看(过去 30 天)
显示 更早的评论
How we can expand matrix A to B? each element of matrix A is equal to sum of each B columns. (step of 3)
A=
[1 5 8 12 7 5 2 1]
to B=
1 3 3 3 3 3 2 1
0 2 3 3 3 2 0 0
0 0 2 3 1 0 0 0
0 0 0 3 0 0 0 0
0 0 0 0 0 0 0 0
采纳的回答
jgg
2016-1-23
编辑:jgg
2016-1-23
This should work
A = [1 5 8 12 7 5 2 1];
floors = floor(A./3);
C = cumsum(3.*ones(max(floors)+1,length(A)),1)
A_p = repmat(A,max(floors)+1,1);
res = 3.*(C <= A_p);
remainder = A - sum(res);
r = cellfun(@(row) find(row == 0, 1, 'first'), num2cell(res,1));
ind = sub2ind(size(res),r,[1:length(A)]);
res(ind) = remainder;
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!