Azzera filtri
Azzera filtri

problem with For loop

1 visualizzazione (ultimi 30 giorni)
Villanova
Villanova il 31 Ott 2012
Hi, i have written this code, but not sure why I don't get anything in my plot. I was wondering if someone could point out what I doing wrong. I am pretty much trying to plot values for certain v_dot values.
global x1lco x2lco
alpha12 = -2.086211466368665;
alpha22 = 1.378057393962953;
alpha11 = -0.082454051332553;
alpha21 = 0.395565864578256;
alpha0 = 0.641764119934185;
g = (x1lco.^2 + x2lco.^2).^2 + alpha12.*x1lco.^2 + alpha22.*x2lco.^2 + alpha11.*x1lco + alpha21.*x2lco + alpha0;
i = 0
for phi = 0:.01:2*pi;
flag = 0;
i = i + 1;
j = 0;
for r = .01:0.01:3;
j = j + 1;
v_dot = -1.*r.^2.*(g + 2.*(alpha22 - alpha12).*sin(phi).*cos(phi)) -1.*r.*(alpha21.*cos(phi)- alpha11.*sin(phi));
if v_dot >=0 & flag == 0
r_b(i) = r;
phi_b(i) = phi;
flag = 1
end
end
end
x1 = r.*cos(phi);
x2= r.*sin(phi);
plot (x2,x1)

Risposta accettata

Kye Taylor
Kye Taylor il 31 Ott 2012
You are only plotting a single point... That is, the variables r and phi are only scalars (1x1 doubles) when you define x1 and x2. Therefore x1 and x2 are also simply scalars.

Più risposte (0)

Categorie

Scopri di più su Loops and Conditional Statements in Help Center e File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by