error occurs in the present code

조회 수: 2 (최근 30일)
MINATI
MINATI 2019년 2월 23일
댓글: Rik 2019년 2월 24일
function main
clc
clear all
x=3;
options=optimset('Display','iter');
x1=fsolve(@solver,x,options);
function F=solver(x)
options=odeset('RelTol',le-8,'AbsTol',[le-8, le-8, le-8]);
[t,u]=ode45(@equation,[0,20],[4 -1 x],options);
s=length(t);
F=u(s,2);
figure(1)
plot(t,u(:,2))
hold on
end
end
function dy=equation(t,y)
dy=zeros(3,1);
dy(1)=y(2);
dy(2)=y(3);
dy(3)=y(2)^2-y(1)*y(3);
end
After running the above code following error occurs:
Not enough input arguments.
Error in fsolve (line 230)
fuser = feval(funfcn{3},x,varargin{:});
Error in (line 10)
x1=fsolve(@solver,x,options);
Caused by:
Failure in initial objective function evaluation. FSOLVE cannot continue.

채택된 답변

Star Strider
Star Strider 2019년 2월 23일
You have a typographical error in your odeset call. You typed ‘l’ (lower-case ‘L’) instead of the number 1.
Use this instead:
options=odeset('RelTol',1e-8,'AbsTol',1e-8);
and your code runs without error.
When I ran it,, the result was:
x1 =
3.732
  댓글 수: 7
Star Strider
Star Strider 2019년 2월 24일
It is one of the initial conditions for your ‘equation’ function differential equation system.
Rik
Rik 2019년 2월 24일
Related question in this new thread.

댓글을 달려면 로그인하십시오.

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Assembly에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by