ode45 error **help please**

nb1
2019 10 18
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更新时间：2019 10 18
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My code, which I am 95% sure is correct, is the following:
function yprime = ex3_2ndorder(x,y)
%name and date
yprime=zeros(2,1);
yprime(1)=y(2);
yprime(2)=exp(x)-4*y(2)-3*y(1);
end
When I run it, it tells me there are not enough input arguments and that the error is in line 4, yprime(1)=y(2);
The ODE I am trying to solve is z"+4z'+3z=e^x, z(0)=1, z'(0)=2
Any help would be greatly appreciated :)

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回答（1 个）

Walter Roberson
Walter Roberson 2019-10-18

0 个投票

ode45(@ex3_2ndorder, stuff
You probably left out the @

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2019-10-18

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2019-10-18

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