solving a parametric system of nonlinear equations

조회 수: 2 (최근 30일)
Mehrdad
Mehrdad 2018년 1월 1일
답변: Sarah Mohamed 2018년 1월 3일
Hi
I am beginner in Matlab. I have the following system of parametric nonlinear equations written in the attached pdf file. I codded in matlab but there is error while running. I would be glad if someone could help me.
global sigma tau delta theta mu B C r eta
%_parameters of the equations_
theta = .36;
sigma=4;
tau=1.35;
delta=0.025;
r=0.02;
eta=0.05 ;
mu= (1-sigma)*((sigma/(sigma-1))*(tau/theta))^(1-sigma);
B=(1-delta)*eta/(1-eta);
C=eta/(eta-1);
options = optimoptions('fsolve','Display','iter');
x0 = [0,0,0,0,0,0];
x = fsolve(@myfun2,x0,options)
I wrote above an initial guess but it is totally a trivial one. I have no clue about the initial value to use.
Below is the function code
function F= fun(x,sigma,tau, delta,theta,mu,B,C,r,eta)
F(1)=x(1)-1/(x(2))^(1-sigma);
F(2)= x(2) - (int(x(3)^(1-sigma),'w',0,inf))^(1/(1-sigma));
F(3)= x(3)-(sigma/(sigma-1))* tau*(x(4)-delta)/theta;
F(4)=x(4)+1 - (1+r-eta*(1-delta)*(x(6)/x(5)))/(1-eta);
F(5)= (1-eta)/(1+r)- (x(1)*mu*(x(4)+delta)^(-sigma)-tau*x(6)-x(5)/(1+x(4))^2)*B*(x(6)/x(5)^2)- 1/(1+x(4));
F(6)=(1-x(4)-delta)*(1-eta)/(1+r)- (x(1)*mu*(x(4)+delta)^(-sigma)-tau*x(6)-x(5)/(1+x(4))^2)*C*(x(6)/x(5)^2)+1;
end

답변 (1개)

Sarah Mohamed
Sarah Mohamed 2018년 1월 3일
Hello!
'fsolve' expects the function passed as its first input (@fun) to take a single input argument, 'x'. It looks like you would like to pass some additional parameters as well. Take a look at the following documentation page for more assistance on this topic:
You might also find the following discussion helpful:

카테고리

Help CenterFile Exchange에서 Systems of Nonlinear Equations에 대해 자세히 알아보기

Community Treasure Hunt

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

Start Hunting!

Translated by