create a matrix from matrix with zeros elements
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have a matrix obtained
A=[ 1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16];
So I just would like to obtain another matrix but with some indexs (or elements ) and the rest is zeros
So I need the output matrix to be
O=[ 1 2 0 0 ;2 1 0 0 ;0 0 6 8;0 0 8 16]
So can anyone advise me with the best way ?
Thanks,
2 commentaires
Sindar
le 24 Jan 2020
what is the logic of which elements are zero, and what value the non-zero ones take?
Réponses (2)
Spencer Chen
le 24 Jan 2020
You can create a new matrix of the same size:
B = zeros(size(A));
Then assign non-zero data in B.
Blessings,
Spencer
Sindar
le 29 Jan 2020
I still don't quite see the pattern, but you can insert elements manually:
x=[1 2 3 4 5 6 ;
7 8 9 10 11 12;
13 14 15 16 17 18;
19 20 21 22 23 24;
25 26 27 28 29 30;
31 32 33 34 35 36];
Y = zeros(4);
Y(1,1) = x(1,1);
Y(1,2) = x(1,4);
Y(2,1) = x(1,4);
Y(2,2) = x(4,4);
Y(3,3) = x(3,3);
Y(3,4) = x(6,3);
Y(4,3) = x(6,3);
Y(4,4) = x(6,6);
% or
Y = zeros(4);
Y(1:2,1:2) = [x(1,1) x(1,4) ; x(1,4) x(4,4)];
Y(3:4,3:4) = [x(3,3) x(6,3) ; x(6,3) x(6,6)];
0 commentaires
Voir également
Catégories
En savoir plus sur Logical 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!