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How to fix my code for ode45

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function_handle with value:
@(x,y)'(9*14^(1/2)*exp(-(2*x)/9)*sin((14^(1/2)*x)/9))/7)'
>> [x,y]=ode45(f,[0,25],0)
Insufficient number of outputs from right hand side of equal sign to satisfy assignment.
this is my ode45 code
[x,y] = ode45(odefun,xspan,y0)
[x,y] = ode45(odefun,xspan,y0,options)
[x,y,xe,ye,ie] = ode45(odefun,xspan,y0,options)
sol = ode45(___)

  1 Comment

James Tursa
James Tursa on 18 Nov 2020
Please post your complete code, not just snippets.

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Accepted Answer

Star Strider
Star Strider on 18 Nov 2020
Delete the single quotation marks.
This runs without error:
f = @(x,y) (9*14^(1/2)*exp(-(2*x)/9)*sin((14^(1/2)*x)/9))/7;
[x,y]= ode45(f,[0,25],0)
figure
plot(x, y)
grid
.

  2 Comments

Marissa Farrell
Marissa Farrell on 18 Nov 2020
i still get this:
>> f = @(x,y) (9*14^(1/2)*exp(-(2*x)/9)*sin((14^(1/2)*x)/9))/7;
[x,y]= ode45(f,[0,25],0)
figure
plot(x, y)
grid
Insufficient number of outputs from right hand side of equal sign to satisfy assignment.
Star Strider
Star Strider on 18 Nov 2020
It ran for me without error in a script I use for MATLAB Answers problems.
Use it in a script (instead of your Command Window) and it should work.

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More Answers (1)

Steven Lord
Steven Lord on 19 Nov 2020
I'm guessing you've defined a variable named ode45 that's preventing you from calling the ode45 function included in MATLAB. To check this, use the which function.
which -all ode45
If you see "ode45 is a variable" in the text displayed by that line of code you will need to rename or delete that variable before you will be able to call the ode45 function.

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