Calculation of Phi value in matlab
8 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
width=20;
length=40;
height=10;
x=1:2:20;
y=1:4:40;
z=1:1:10;
E =length/width;
alpha=atan(E);
x1= (x.*sin(alpha)) - (y .* cos (alpha));
y1= (height./2)-z;
k= y1 ./ x1;
phi1=zeros(size(k));
for ii= 1:length(k)
if k(ii)>0
phi1(ii)= atan(k(ii)); % equation 1
else
phi1(ii)= pi-atan(k(ii)); % equation 2
end
end
Error msg : ??? Subscript indices must either be real positive integers or logicals.
Sorry. I am very noob at matlab. Please help me correct with the error. I am trying to calculate the phi1 value. When k is positive it have to use the quation 1 and when k is negative it have to use the equation 2.
0 commentaires
Réponse acceptée
maria
le 25 Août 2015
Try:
width=20;length=40;height=10;
x=1:2:20;
y=1:4:40;
z=1:1:10;
E =length/width;
alpha=atan(E);
x1= (x.*sin(alpha)) - (y .* cos (alpha));
y1= (height./2)-z;
k= y1 ./ x1;
[M,N]=size(k)
phi1=zeros(N);
for ii= 1:N
if k(ii)>0 phi1(ii)= atan(k(ii)); % equation 1 else phi1(ii)= pi-atan(k(ii)); % equation 2
end
end
Plus de réponses (1)
Image Analyst
le 25 Août 2015
This error is very well explained by the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_fix_the_error_.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22.3F After reading that, you will know what to do.
Voir également
Catégories
En savoir plus sur Statistics and Machine Learning Toolbox 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!