how to plot objective function with variables

Question

RAHUL KUMAR 2019-8-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476854-how-to-plot-objective-function-with-variables

回答： Alan Weiss 2019-8-22

xo=[0.0011,0.0049,0.3]; % assumptions
%[Q]=heatload1_new(xo)
%nvars=3;
A=[];
b=[]; 
Aeq=[];
beq=[];
lb=[0.001,0.002,0.01];   %lower bound
ub=[0.01,0.08,0.5];    %upper bound
nonlincon = @(x)constraint_new(x);    % calling constraint function
Fitnessfun = @(x)weight_testvariable(x);  %calling objective function
options = optimoptions(@fmincon,'Display','iter-detailed','Algorithm','sqp','MaxIterations',1500)
options = optimset('Display','iter','TolFun',1e-5)
[X,fval]=fmincon(Fitnessfun,xo,[],[],[],[],lb,ub,nonlincon,options)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Alan Weiss 2019-8-22

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476854-how-to-plot-objective-function-with-variables#answer_388662

在 MATLAB Online 中打开

You have two definitions of options, meaning the first definition does nothing:

options = optimoptions(@fmincon,'Display','iter-detailed','Algorithm','sqp','MaxIterations',1500) % gets overwritten
options = optimset('Display','iter','TolFun',1e-5)

If you want to plot the objective function value as the optimization runs, set the PlotFcn argument to 'optimplotfval'. If you also want to plot the current point at the same time, set the PlotFcn argument to a cell array, {@optimplotfval,@optimplotx}.

Alan Weiss

MATLAB mathematical toolbox documentation