How to create a matrix of size N×N that has ones in the border and zeros inside?
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Create a matrix of size N×N that has ones in the border and zeros inside.
For example, if N=3 the matrix can be created with
>> A=ones(3,3);
A(2,2)=0
A =
1 1 1
1 0 1
1 1 1
Make this construction depend on N and work for any positive integer N≥2.
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Réponse acceptée
KL
le 6 Sep 2017
Modifié(e) : KL
le 6 Sep 2017
function A = oneZeroMatrix(N)
A = zeros(N);
A([1 end],:)=1;
A(:,[1 end])=1;
end
% and then
N = 5;
A = oneZeroMatrix(N);
2 commentaires
Walter Roberson
le 26 Nov 2022
Let us experiment:
N = 5;
A = oneZeroMatrix_original(N)
A = oneZeroMatrix_modified(N)
function A = oneZeroMatrix_original(N)
A = zeros(N);
A([1 end],:)=1;
A(:,[1 end])=1;
end
function A = oneZeroMatrix_modified(N)
A = zeros(N);
A([1:end],:)=1;
A(:,[1:end])=1;
end
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