What's wrong with my objective function?

Richárd Tóth

2019 8 3

0 个回答

6 次查看（30 天）

0 个投票

Hello

When I run this line of code,

[d,fval] = fseminf(@objfun,x0,numOfInequations,@semInfConstraints);

I get the following error:

Input arguments to function include colon operator. To input the colon character, use ':' instead.
Error in fseminf (line 424)
initVals.f = initVals.f(:);
Error in optimize (line 29)
[d,fval] = fseminf(@objfun,x0,numOfIneqs,@semInfConstraints); 

Here is my objective function:

function f = objfun(D,s)
global numOfVars
% Objective function, -1*D(1)*D(2)*...*D(n) /n dimension/
str = 'f=@(D) -1*';
dimension = numOfVars;
for i=1:dimension
    if i<dimension 
        str = join([str 'D(' string(i) ')*'],'');
    else
        str = join([str 'D(' string(i) ');'],'');
    end
    
end
eval(str);

3 个评论
显示 1更早的评论隐藏 1更早的评论

Richárd Tóth 2019-8-3

在 MATLAB Online 中打开

Okay, I think the problem is

str = 'f=@(D) -1*';

By removing the @(D), I no longer get the error message about the colon.

Star Strider 2019-8-3

If you want to create a functon from a string, use the str2func function. It likely does everything you’re doing, however it’s more straightforward. Also,using sprintf to create your function strings is likely more efficient than concatenating strings.

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question