Info
Cette question est clôturée. Rouvrir pour modifier ou répondre.
I want element (3,2) from a matrix with size (4,4) to try the values of the first column from another matrix with size (3,3) one by one and at each time produce the new matrix. How can I do this ?
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
For example: If I have matrix A and Matrix B:
A =
7 4 1
4 5 6
3 6 9
B =
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
I want element (3,2) from matrix B with size (4,4) to try the values of the first column from matrix A with size (3,3) one by one and at each time produce the new matrix. So, the output will be:
B =
0 0 0 0
0 0 7 0
0 0 0 0
0 0 0 0
B =
0 0 0 0
0 0 4 0
0 0 0 0
0 0 0 0
B =
0 0 0 0
0 0 3 0
0 0 0 0
0 0 0 0
How can I do this ?
1 commentaire
Stephen23
le 10 Mai 2017
Duplicate:
https://www.mathworks.com/matlabcentral/answers/339458-what-s-the-solution
Réponses (1)
Geoff Hayes
le 9 Mai 2017
Mahmoud - do you want to keep the updated B at each iteration, or just use it and then dispose of it?
for k=1:size(A,1)
B = zeros(4,4);
B(2,3) = A(k,1);
% do something with B
end
In the above, we iterate over each row in the first column of A and set the appropriate element of B with it.
Note how we use B(2,3) to access the element in the second row and third column of B (rather than the B(3,2) that you mention).
2 commentaires
Geoff Hayes
le 10 Mai 2017
Which value in the second column of A? You should be able to modify the above so that you can accomplish that task.
Cette question est clôturée.
Voir également
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!