Changing elements in a MxN matrix
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
WARRIOR24
le 20 Avr 2021
Modifié(e) : per isakson
le 20 Avr 2021
I am trying to get zeros for certain part of a Matrix to zeros
I need this matrix ones that are bolded, underlines, italic "1" to become zeros. I have been trying to figure this out for a while. I tried if statesments for row > 5 and for loops.
4 1 0 1 0 1 0 1 0 1
1 4 1 0 1 0 1 0 1 0
0 1 4 1 0 1 0 1 0 1
1 0 1 4 1 0 1 0 1 0
0 1 0 1 4 1 0 1 0 1
1 0 1 0 1 4 1 0 1 0
0 1 0 1 0 1 4 1 0 1
1 0 1 0 1 0 1 4 1 0
0 1 0 1 0 1 0 1 4 1
1 0 1 0 1 0 1 0 1 4
Here is my code:
inverse = diag(ones(10,1));
inverse = inverse*4;
for col = 1:length(domain-1)
for row = 1:10
if row == col
inverse(row+1,col) = 1;
inverse(row,col+1) = 1;
elseif mod(row+col,2) == 1
inverse(row,col) = 1;
end
end
end
matrix = inverse(Nx-1,Ny-1)
0 commentaires
Réponse acceptée
per isakson
le 20 Avr 2021
Modifié(e) : per isakson
le 20 Avr 2021
Does this help?
%%
matrix = magic(10);
matrix = triu( matrix,-4 );
matrix = tril( matrix, 4 )
%% This is better, it only overwrites the specific diagonals
matrix = magic(10);
for k = [5,7,9]
isdiag = diag( true(10-k,1), k );
matrix( isdiag ) = 0;
isdiag = diag( true(10-k,1), -k );
matrix( isdiag ) = 0;
end
matrix
I was fooled by your example and used a 10x10 matrix in my demos. Your title says MxN matrix.
0 commentaires
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Matrices and Arrays 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!