ezplot is plotting a blank plot
2 views (last 30 days)
Show older comments
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 Comments
Answers (3)
Mark Sherstan
on 12 Dec 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 Comments
Cris LaPierre
on 12 Dec 2018
Edited: Cris LaPierre
on 12 Dec 2018
You did not try to plot the solution that contains constant C5 (ysol(4)). Your plots are for
- 0
- 2x
- -2x
Cris LaPierre
on 12 Dec 2018
Edited: Cris LaPierre
on 12 Dec 2018
You equation has two variables. You need to provide a value for for ezplot to be able to plot the functions.
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 Comments
Brenda Galabe
on 12 Dec 2018
1 Comment
Cris LaPierre
on 12 Dec 2018
I didn't realize you were using an older version of MATLAB. The behavior will be different. Use ezplot for now.
See Also
Categories
Find more on Line Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!