ezplot is plotting a blank plot
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
no errors nut plot is blank
syms y(x)
a=2;
b=6;
c=1;
d= 8;
e = 6;
ode = diff(y,x) == (-d*x)/(e*y);
ysol = vpa(dsolve(ode))
ezplot(ysol(1))
hold on
ezplot(ysol(2))
0 commentaires
Réponses (3)
Mark Sherstan
le 12 Déc 2018
You need to solve for your constant C2 otherwise your function is no longer in terms of just x which is a requirment of ezplot.
2 commentaires
Cris LaPierre
le 12 Déc 2018
Modifié(e) : Cris LaPierre
le 12 Déc 2018
You did not try to plot the solution that contains constant C5 (ysol(4)). Your plots are for
- 0
- 2x
- -2x
Cris LaPierre
le 12 Déc 2018
Modifié(e) : Cris LaPierre
le 12 Déc 2018
You equation has two variables. You need to provide a value for
for ezplot to be able to plot the functions.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/198901/image.png)
Also, best to heed the warnings in the documentation - use fplot instead of ezplot.
If I use fplot and substitute in a value for C2, your code works.
...
ysol = subs(ysol,'C2',25)
fplot(ysol(1))
hold on
fplot(ysol(2))
0 commentaires
Brenda Galabe
le 12 Déc 2018
1 commentaire
Cris LaPierre
le 12 Déc 2018
I didn't realize you were using an older version of MATLAB. The behavior will be different. Use ezplot for now.
Voir également
Catégories
En savoir plus sur Line Plots 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!