problem with plotting differential equation
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
i have differential equation y'+y*cos(t)=sin(t)*cos(t)+4. how i can solve this equation. i used p=dsolve('Dy+y*cos(t)=sin(t)*cos(t)+4','y(0)=0') i receive p =
exp(-sin(t))*int((exp(sin(x))*(sin(2*x) + 8))/2, x == 0..t, IgnoreAnalyticConstraints)
then i used
plot(p) i receive Error using plot Conversion to double from sym is not possible.
when i use ezpolot(p,[-1,1])
i receive Error using ezplot (line 163) exp(-sin(t))*int((exp(sin(x))*(sin(2*x) + 8))/2, x == 0..t, IgnoreAnalyticConstraints) cannot be plotted in the xy-plane.
Error in sym/ezplot (line 76) h = ezplot(fhandle(f),varargin{:});
how i plot graph for differential equation
1 commentaire
Réponses (1)
Mischa Kim
le 9 Avr 2014
Modifié(e) : Mischa Kim
le 9 Avr 2014
Goran, use something like
function myODE()
tspan = 0:0.1:10;
IC = 1;
[t,y] = ode45(@ODEfun,tspan,IC);
plot(t,y,'r')
xlabel('t')
ylabel('y')
grid
end
function dY = ODEfun(t,y)
dY = -y*cos(t) + sin(t)*cos(t) + 4;
end
0 commentaires
Voir également
Catégories
En savoir plus sur Ordinary Differential Equations 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!