How expand a matrix?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
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
4 Kommentare
Akzeptierte Antwort
jgg
am 23 Jan. 2016
Bearbeitet: jgg
am 23 Jan. 2016
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;
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Matrices and Arrays finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!