Element wise multiplication to matrix in a "matrix array"?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
I have an array of matrix m such that
m1 = [1 2;3 4];
m2 = [2 7; 8 9];
m3 = [9 7; 8 91];
m = [m1 m2 m3]
m =
1 2 2 7 9 7
3 4 8 9 8 91
I also have a vector
v = [1 2 3];
such that i want the operations between v and m result in h such that
h = [1*m1 2*m2 3*m3] = [h1 h2 h3];
From h i want to extract h1 h2 and h3 out(, how?) such that
h1*A*h1'
h2*A*h2'
h3*A*h3'
and where A is a 2 by 2 matrix, say [10 11; 12 13].
h1*h1', h2*h2', h3*h3'.
The reason i want to do this in array is because i have a lot of matrix mi so I want to avoid for loop by vectorization.
2 Kommentare
Antworten (1)
Azzi Abdelmalek
am 27 Aug. 2016
m1 = [1 2;3 4];
m2 = [2 7; 8 9];
m3 = [9 7; 8 91];
m = [m1 m2 m3]
[n1,n2]=size(m1)
v=[1 2 3]
M=reshape(m,n1,n2,[])
B=bsxfun(@times,M,reshape(v,1,1,[]))
out=B(:,:)
0 Kommentare
Siehe auch
Kategorien
Mehr zu Logical finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!