Largest column of a matrix
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Given an m by n matrix, the e. g. A=[3, 1,2;3,1,1;3,6,2] I want write a Matlab function that finds which of the collumn of A has the highest norm and returns it. This is my attempt
function v=maxivect(A)
[m, n] =size(A);[i, j] =find(ismember(A, ceilmax((normvector(A, inf))) )); v=A(:,j);
end
Instead of getting back the vector having the maximum norm, mostly it returns empty vector while it is not. It works fine with example above but not all, for example if A=rand(3)
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dpb
le 4 Juin 2021
Try
function v=maxivect(A)
[~,ix]=max(arrayfun(@(i) norm(A(:,i)),[1:size(A,2)]));
v=A(:,ix);
end
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