Using the find function
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Denikka Brent
le 11 Nov 2018
Commenté : madhan ravi
le 11 Nov 2018
I am trying to pull out a certain value in this function. I am trying to find the values of the wbar(i,1),wbar(i,2), and wbar(i,3) each at M=0,0.5,1,and 5. I can get it to work at M=0 and M=5 but not between. Can anyone help with this?
Here is my code:
n = 100;
M = linspace(0,5,n);
wbar = NaN(n,3);
wbar(1,:) = [pi/2,3*pi/2,5*pi/2];
for i=2:n
fun = @(w) cos(w) - M(i)*sin(w);
wbar(i,1) = fzero(fun,wbar(i-1,1));
wbar(i,2) = fzero(fun,wbar(i-1,2));
wbar(i,3) = fzero(fun,wbar(i-1,3));
end
figure(1)
plot(M,wbar,'-')
grid on
index = find(M==2);
freq1=wbar(index,1)
index = find(M==2);
freq2=wbar(index,2)
index = find(M==2);
freq3=wbar(index,3)
1 commentaire
Réponse acceptée
madhan ravi
le 11 Nov 2018
Modifié(e) : madhan ravi
le 11 Nov 2018
index = (M>2&M<5); %M greater than 2 and less than 5
Logical indexing is efficient
2 commentaires
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Matrix Indexing 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!