Code for Multiple Matrix Multiplication
11 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Prasanna Venkatesh
le 14 Juin 2019
Commenté : Prasanna Venkatesh
le 14 Juin 2019
I have 'n' number of two dimensional(square) matrices. I have stored them as stack in a single three dimensional matrix. How can I perform series of matrix multiplication from 1 to n matrices without explicitly writing the whole line?
n=3;
a,b,c; % Three 2d matrices with same dimension
T(:,:,1) = a;
T(:,:,2) = b;
T(:,:,3) = c;
ans = T(:,:,1)*T(:,:,2)*T(:,:,3);% Explicitly performing matrix multiplication
0 commentaires
Réponse acceptée
Stephen23
le 14 Juin 2019
Modifié(e) : Stephen23
le 14 Juin 2019
>> T=randi(9,4,4,3); % fake data
>> T(:,:,1)*T(:,:,2)*T(:,:,3) % your approach
ans =
2359 1398 2072 2154
1788 1103 1625 1734
1731 1137 1653 1808
2154 1282 1849 1995
>> M=1; for k=1:size(T,3), M=M*T(:,:,k); end % simple loop
>> M
M =
2359 1398 2072 2154
1788 1103 1625 1734
1731 1137 1653 1808
2154 1282 1849 1995
Plus de réponses (1)
madhan ravi
le 14 Juin 2019
RR = cell(1,size(T,3)-1); % where T is your 3D matrix
RR{1} = T(:,:,1)*T(:,:,2);
for k = 2:size(T,3)-1
RR{k} = RR{k-1} * T(:,:,k+1);
end
Wanted = RR{end}
0 commentaires
Voir également
Catégories
En savoir plus sur Surface and Mesh Plots dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!