Error using fmincon (line 288) A must have 1 column(s).

i have this problem any one know how can i solve it

Error using fmincon (line 288)
A must have 1 column(s).

Error in Untitled3 (line 34)
[x,fval,exitflag,output] = fmincon(fun,nvars,A,b,Aeq,beq,LB,UB,nonlcon,IntCon,options)

the code is

clc
clear all
fun=@(x) 2.633*x(1)+2.992*x(2)+3.134*x(3)+3.678*x(4)+3.620*x(5)+2.948*x(6)+1.607*x(7)+2.952*x(8)+3.348*x(9)+3.680*x(10)+3.774*x(11)+2.995*x(12)+3.237*x(13)+1.608*x(14);
nvars = 14;                                                     % Number of variables
LB = [0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05]; % Lower bound for (x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14)
UB = [1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1]; % Upper bound for (x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14)
 A=zeros(20,14); b=zeros(20,1);
 A(1,1)=+2.633;   A(1,6)=-4.112;   b(1)=-0.3;  %first row
 A(2,1)=-4.870;   A(2,2)=+2.992;   b(2)=-0.3;  %second row
 A(3,2)=+2.992;   A(3,7)=-2.178;   b(3)=-0.3;  %third row
 A(4,2)=-3.857;   A(4,3)=+3.130;   b(4)=-0.3;  %fourth row
 A(5,3)=-3.989;   A(5,4)=+3.678;   b(5)=-0.3;  %fifth row
 A(6,4)=-4.979;   A(6,5)=+3.620;   b(6)=-0.3;  %sixth row
 A(7,5)=-5.756;   A(7,6)=+2.948;   b(7)=-0.3;  %seventh row
 A(8,5)=-5.826;   A(8,7)=+1.607;   b(8)=-0.3;  %eighth row
 A(9,6)=+2.948;   A(9,14)=-2.150;  b(9)=-0.3;  %nighth row
 A(10,7)=+1.607;  A(10,13)=-6.920; b(10)=-0.3; %tenth row
 A(11,7)=-2.144;  A(11,8)=+2.952;  b(11)=-0.3; %eleventh row
 A(12,8)=+2.952;  A(12,9)=-5.365;  b(12)=-0.3; %tweleventh row
 A(13,9)=+3.348;  A(13,10)=-4.863; b(13)=-0.3; %thirteenth row
 A(14,10)=+3.680; A(14,11)=-5.073; b(14)=-0.3; %fourteenth row
 A(15,11)=+3.774; A(15,12)=-3.774; b(15)=-0.3; %fiveteenth row
 A(16,12)=+2.995; A(16,13)=-6.920; b(16)=-0.3; %sixteenth row
 A(17,12)=+2.995; A(17,14)=-2.151; b(17)=-0.3; %seventennth row
 A(18,8)=-4.288;  A(18,13)=+3.237; b(18)=-0.3; %eighteenth row
 A(19,1)=-4.870;  A(19,14)=+1.608; b(19)=-0.3; %nighnteenth row
 A(20,9)=-5.365;  A(20,14)=+1.608; b(20)=-0.3; %twinty row
Aeq=[];
beq=[];
nonlcon=[];
IntCon=[];
rng default % For reproducibility
options = optimoptions('fmincon','Display','iter','Algorithm','sqp');
[x,fval,exitflag,output] = fmincon(fun,nvars,A,b,Aeq,beq,LB,UB,nonlcon,IntCon,options)

[madhan ravi]

it clearly says A must have 1 column but you assigned 14 columns

[tahseen alshmary]

how can i write it again for 1 column with 14 variables

can you write it please

Answer 1

[Walter Roberson]

fmincon does not take aa nvars parameter . It takes an x0 parameter .

[tahseen alshmary]

can you explain more

or write it to me please

[Torsten]

[x,fval,exitflag,output] = fmincon(fun,ones(14,1),A,b,Aeq,beq,LB,UB,nonlcon,options)

And "fmincon" is overkill for your problem ; use "linprog" instead.

[tahseen alshmary]

Dear toresten

i want to use it with PSO (hybrid PSO)

anyway the problem now appear another error

can you help me please in this error

Error using

Untitled3>@(x)2.633*x(1)+2.992*x(2)+3.134*x(3)+3.678*x(4)+3.620*x(5)+2.948*x(6)+1.607*x(7)+2.952*x(8)+3.348*x(9)+3.680*x(10)+3.774*x(11)+2.995*x(12)+3.237*x(13)+1.608*x(14)

Too many input arguments.

Error in fmincon (line 536)

initVals.f = feval(funfcn{3},X,varargin{:});

Error in Untitled3 (line 34)

[x,fval,exitflag,output] = fmincon(fun,nvars,A,b,Aeq,beq,LB,UB,nonlcon,IntCon,options)

Caused by:

Failure in initial objective function evaluation. FMINCON cannot continue.

[Torsten]

Why do you use your old call to "fmincon" instead of the one I provided ?

[tahseen alshmary]

i used it above in the code

nvars = ones(14,1); you can see

and appear new error

can you help me in that error

thanks

[Torsten]

"IntCon" is not part of my list of variables passed to "fmincon".

[tahseen alshmary]

Okay thanks

now appear this error

Error using fmincon (line 288)

A must have 196 column(s).

Error in Untitled3 (line 34)

[x,fval,exitflag,output] = fmincon(fun,nvars,A,b,Aeq,beq,LB,UB,nonlcon,options)

[Torsten]

Try

nvars = ones(1,14)

[tahseen alshmary]

thanks alot

its work now

do you know how can i collect it with PSO algorithm

and i give accept answer for another answer by wronge how can i delet it and correct my choose .

[Walter Roberson]

particleswarm() accepts an nvar parameter but not an x0 parameter . Initial conditions of particleswarm can only be passed in through options .

[tahseen alshmary]

do you know how can i use only pso as matlab toolbox with all parameter like (c1,c2,wmax,wmin.......)

[Walter Roberson]

https://www.mathworks.com/help/matlab/math/parameterizing-functions.html