Ordinary Differential Equations (ODEs)

syms t y(t)
ysol=dsolve(' D2y + Dy + 4.25*y = 0','y(0)=2','Dy(0)=1');
y(t)=simplify(ysol)
ezplot(y(t),[0 10]);
xlabel('t');
ylabel('y(t)');

Based on the code block above, I get the following output.

But the output I want to get is as follows.

The formula is as above

I have to use ezplot. How can I get the 2nd output? Where am I making a mistake?

Answer 1

[Star Strider]

Change the ezplot call to fplot:

syms t y(t)
ysol=dsolve(' D2y + Dy + 4.25*y = 0','y(0)=2','Dy(0)=1');

Warning: Support of character vectors and strings will be removed in a future release. Use sym objects to define differential equations instead.

y(t)=simplify(ysol)

y(t) = 

fplot(y(t),[0 10]);
xlabel('t');
ylabel('y(t)');
grid

And note the Warning.

[Kutlu Yigitturk]

I'm asking because I don't know, what's the difference between fplot and ezplot?

[Star Strider]

The documentation for fplot and ezplot explains it better than I can. Essentially, fplot is more robust anbd easier to use, although there are some differences.

[Kutlu Yigitturk]

Thank you.

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

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