is this code is right? this code is for trilateration it shows error.
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Darshan Patel
le 3 Juin 2016
Commenté : Walter Roberson
le 3 Juin 2016
This code is shows error at line 22 and 29
warning is : matrix is singular to working precision.
is this code is right if not please give suggetions..
function [ x, y ] = two_tri(x1, x2, x3, y1, y2, y3, d1, d2, d3)
%2-D trilateration function
% Inputs: Readers 1-3 (x,y) and Distances to Tag
%
% x_n1 = (d1^2 - d2^2)-(x1^2 - x2^2)-(y1^2 - y2^2)*2*(y3 - y1)
% x_n2 = 2*(y2 - y1)*(d1^2 - d3^2) - (x1^2 - x3^2) - (y1^2 - y3^2)
% x_d = 2*(x2 - x1)*2*(y3 - y1) - 2*(y2 - y1)*2*(x3-x1)
% x = (x_n1 - x_n2)/x_d
% y = 2;
%
x_n11 = (d1^2 - d2^2) - (x1^2 - x2^2) - (y1^2 - y2^2);
x_n21 = (d1^2 - d3^2) - (x1^2 - x3^2) - (y1^2 - y3^2);
x_n12 = 2*(y2-y1);
x_n22 = 2*(y3-y1);
d11 = 2*(x2-x1);
d21 = 2*(x3-x1);
d12 = 2*(y2-y1);
d22 = 2*(y3-y1);
x_n = [x_n11, x_n12; x_n21, x_n22];
d = [d11, d12; d21, d22];
x = x_n/d;
x = det(x);
y_n11 = d11;
y_n21 = d21;
y_n12 = x_n11;
y_n22 = x_n21;
y_n = [y_n11, y_n12; y_n21, y_n22];
y = y_n/d;
y = det(y);
x11=[x1 x2 x3 x];
y11=[y1 y2 y3 y];
scatter(x11,y11);
disp(x11);
disp(y11);
end
0 commentaires
Réponse acceptée
Walter Roberson
le 3 Juin 2016
You never use the output of your det() calls, so you should get rid of them.
3 commentaires
Walter Roberson
le 3 Juin 2016
You cannot run the code just by pressing an F key or clicking on the Run button. You need to go to the command line and use the routine in command form, passing in the data you need. For example,
x = rand(1,3); y = rand(1,3); d = rand(1,3);
[X, Y] = two_tri(x(1), x(2), x(3), y(1), y(2), y(3), d(1), d(2), d(3))
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Logical 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!