Errors in solving nonlinear simultaneous equations
조회 수: 1 (최근 30일)
이전 댓글 표시
Hello all, I'm trying to solve nonlinear simultaneous equations. However, Matlab is giving errors, which I cannot rectify. Any help is much appreciated.
I made a function file:
function [ f ] = nlsimul( x)
%nlsimul has two nonlinear simultaneous equations in variable x(1), x(2)
f = [-2*(x(1).^2).*exp(-x(1).^2-(x(2).^2))+exp(-x(1).^2-(x(2).^2)); ...
-2.*x(1).*x(2)*exp(-x(1).^2-(x(2).^2))];
end
Then I made a script file to solve this system of equations:
%This script calles nlsimul() to solve nonlinear simultaneous equations
options = optimoptions('fsolve','Diagnostics','on','Display','iter','PlotFcns','@optimplotresnorm');
x0=[2,2];
[x,fval,exitflag,output] = fsolve(@nlsimul,x0,options)
Upon running this script file, Matlab gives several errors. Can someone help?
댓글 수: 0
채택된 답변
Sven
2013년 7월 31일
편집: Sven
2013년 7월 31일
You can't plot a simultaneous equation during iterations in that way.
If you instead put:
options = optimoptions('fsolve','Diagnostics','on','Display','iter');
Then your optimisation runs perfectly.
If you instead put (note the function handle rather than string):
options = optimoptions('fsolve','Diagnostics','on','Display','iter','PlotFcns',@optimplotresnorm);
Then it solves fine as well... it's too quick to see anything plotted though...
Did that help you out?
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Loops and Conditional Statements에 대해 자세히 알아보기
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!