nonlcon : Too many input arguments.

Question

0 个投票

Hi friends, I have a problem with optimization algorithm like GA, fmincon and patternsearch. When I try to add constrain to my problem error below appear:

Error using Constrain
Too many output arguments.
Error in poptimfcnchk (line 58)
            [cineq,ceq] = feval(nonlcon,reshapeinput(Xin,X),conFcnArg{:});
Error in patternsearch (line 343)
[Iterate,OUTPUT.funccount] = poptimfcnchk(FUN,nonlcon,initialX,Iterate, ...
Error in Main (line 30)
[x,Fval,exitFlag,output]=patternsearch(@(x)
Objective(x),X0,[],[],[],[],LB,UB,@Constrain,options)
Caused by:
    Failure in initial user-supplied nonlinear constraint function evaluation.
    PATTERNSEARCH cannot continue.

However, when I omit the constrain from optimization it works very well. After adding adding constrain to my problem this error occur. Could anyone help???

Thanks.

2 个评论
显示无隐藏无

Torsten 2015-11-24

You will have to show us your function with name "Constrain".

Best wishes

Torsten.

Ali T 2015-11-24

在 MATLAB Online 中打开

The Constrain function is not like what other simple functions. Because of sizing component which runs with ADVISOR is implemented, it may sounds weird to you. Anyway, I bring me code down there:

function Con=Constrain(x)
input.accel.param = {'spds','max_speed_bool'} ;
input.accel.value = {[0 37.28]};%;37.28 55.9234]} ;
[error, resp] = adv_no_gui('accel_test',input) ;
accel_1 = resp.accel.times(1) ;
MaxSpeed = resp.accel.max_speed*1.60934 ; 
if ~error
Con=[accel_1/10-1;1-MaxSpeed/100];
end

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question

Answer 1

Alan Weiss 2015-11-24

在 MATLAB Online 中打开

0 个投票

To quote the documentation on nonlinear constraints, "Nonlinear constraint functions must return both c and ceq, the inequality and equality constraint functions, even if they do not both exist. Return empty [] for a nonexistent constraint."

In other words, you need to rewrite your constraint function as follows, assuming your existing constraints are inequality rather than equality constraints:

function [Con,coneq] = Constrain(x)
Con = [];
coneq = [];
input.accel.param = {'spds','max_speed_bool'} ;
input.accel.value = {[0 37.28]};%;37.28 55.9234]} ;
[error, resp] = adv_no_gui('accel_test',input) ;
accel_1 = resp.accel.times(1) ;
MaxSpeed = resp.accel.max_speed*1.60934 ; 
if ~error
Con=[accel_1/10-1;1-MaxSpeed/100];
end

Alan Weiss

MATLAB mathematical toolbox documentation

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Ali T 2015-11-24

编辑：Ali T 2015-11-24

在 MATLAB Online 中打开

Marvelous, that worked... amazing, thank you. Unfortunately I am not convinced why do I have to use con=[] and coneq=[] ??? When I ran my code, something new error pops up... Could you please help me solving this error too???

Error in adv_no_gui case {accel_test}:
    Index exceeds matrix dimensions.
    Attempt to reference field of non-structure array.
    Error in Constrain (line 11)
    accel_1 = resp.accel.times(1) ;
    Error in poptimfcnchk (line 58)
                [cineq,ceq] = feval(nonlcon,reshapeinput(Xin,X),conFcnArg{:});
    Error in patternsearch (line 343)
    [Iterate,OUTPUT.funccount] = poptimfcnchk(FUN,nonlcon,initialX,Iterate, ...
    Error in Main (line 30)
    [x,Fval,exitFlag,output]=patternsearch(@Objective,X0,[],[],[],[],LB,UB,@Constrain,options)
    Caused by:
        Failure in initial user-supplied nonlinear constraint function evaluation.
        PATTERNSEARCH cannot continue.

请先登录，再进行评论。

nonlcon : Too many input arguments.

2 个评论
显示无隐藏无

采纳的回答

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

类别

标签

Community Treasure Hunt

nonlcon : Too many input arguments.

2 个评论 显示 无 隐藏 无

采纳的回答

1 个评论 显示 -1更早的评论 隐藏 -1更早的评论

更多回答（0 个）

类别

标签

另请参阅

Community Treasure Hunt

2 个评论
显示无隐藏无

1 个评论
显示 -1更早的评论隐藏 -1更早的评论