How to fix my code for ode45

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(___)

[James Tursa]

Please post your complete code, not just snippets.

Answer 1

[Star Strider]

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

.

[Marissa Farrell]

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]

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.

Answer 2

[Steven Lord]

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.