Effacer les filtres
Effacer les filtres

I have a double variable equation with the values of x(a) and y(b), I am asked to find the maximum values(done) . Then I need to find which values of y are where the maximum happens. The problem is that the equation matriz(D) is 300 x 100.

1 vue (au cours des 30 derniers jours)
a = 0.01:0.01:1; na = length(a);
b = 0.01:0.01:3; nb = length(b);
D = zeros(nb,na);
for k=1:nb
for J=1:na
D(k,J)=(1/sqrt((((1-(b(k)).^2).^2)+(2*a(J)*b(k)).^2)));
end
end
s = max(D,[],1);
%figure;
%plot(b,D); xlim([0 3]); ylim([0 10]);
%xlabel('B'); ylabel('D');
%figure;
%plot(a,s,'-bo','Markerfacecolor','g', 'Linewidth',2);
%xlim ([ 0 1]); ylim ([0 10]); xlabel ('razón de amortiguamiento');

Réponses (2)

Sargondjani
Sargondjani le 9 Avr 2012
[s, index]=max(D,[],1);
your s contains the maximum value for each column, the index contains the row number. So b(index) gives you the corresponding value
(you can also get the maximum of the whole matrix by applying the 'max' twice)

Andrei Bobrov
Andrei Bobrov le 9 Avr 2012
a = 0.01:0.01:1;
b = 0.01:0.01:3;
[jj,k] = ndgrid(b,a);
D1 = 1./hypot( 1-jj.^2, 2*k.*jj );
[~,imx] = max(D1(:));
out = b(rem(imx-1,size(D1,1))+1)

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