How to plotting symbolic solution over range?
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/316038/image.png)
syms y(x)
ode = x * diff(y, x) == (50) * x * diff(y, x, 2) - (40.3) * x + (101); % DE shown above.
x_dot = dsolve(ode);
plot(195, x_dot)
The value (101) changes with frequency, but I've simplified the equation for minimalism.
I'm trying to plot x_dot vs frequency, but I get:
>> Input must be a function or functions of a single variable.
How can I plot this?
1 commentaire
KSSV
le 15 Juin 2020
x_dot will be a symbolic expression with x and has two constants C1, C2. You cannot plot using plot.
Réponses (1)
Ameer Hamza
le 15 Juin 2020
Modifié(e) : Ameer Hamza
le 15 Juin 2020
There is a mistake in the writing of the equations. Also, you need to specify initial conditions to solve for the constant of integrations. Try following code
syms y(x)
dy = diff(y, x, 1);
dy2 = diff(y, x, 2);
ode = dy == (50) * dy2 - (40.3) * x + (101); % DE shown above.
ic = [y(0)==1, dy(0)==0]; % initial conditions
y_sol(x) = dsolve(ode, ic);
fplot(y_sol, [0 10])
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/316077/image.png)
0 commentaires
Voir également
Catégories
En savoir plus sur Equation Solving 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!