Operator '*' is not supported for operands of type 'struct'.

조회 수: 129 (최근 30일)
tahseen alshmary
tahseen alshmary 2021년 10월 4일
답변: tahseen alshmary 2021년 10월 4일
Dear Sir
Nice Greeting
I get this Error
Operator '*' is not supported for operands of type 'struct'.
with this objective function
of =2.6773*x(1)+3.1007*x(2)+3.2178*x(3)+ 3.8021*x(4)+3.6727*x(5)+3.0442*x(6)+1.6362*x(7)+3.0479*x(8)+3.3917*x(9)+3.7468*x(10)+3.8989*x(11)+3.1073*x(12)+3.3207*x(13)+ 1.6382*x(14);
How can I solve this Error
Thanks in advance
  댓글 수: 4
tahseen alshmary
tahseen alshmary 2021년 10월 4일
Hi
excuse me, can you writ the objective function to me by formula x(i)
Andrea Strappato
Andrea Strappato 2021년 10월 4일
x(i) is the i-values/element from your x struct data type. So , for example, to get the i-th element from x try this: "struct_name(i).x".
Can you show your struct x data type?

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채택된 답변

Walter Roberson
Walter Roberson 2021년 10월 4일
The code itself did not have the problem you reported, but you need a replacement PSO.m file.
% Problem preparation
problem.nVar = 14;
problem.ub = 1.1 * ones(1, 14);
problem.lb = 0.05 * ones(1, 14);
problem.fobj = @ofun;
%--------------------------------------------------------------------------
noP=30; %number of population
maxIter=1000; %number of iteration
func=@ofun;
visFlag = 1; % set this to 0 if you do not want visualization
RunNo = 30;
BestSolutions_PSO = zeros(1 , RunNo);
%%
[GBEST,cgcurve ] = PSO( noP , maxIter, problem , visFlag ) ;
The modified PSO.m is attached.
Also, I optimized your ofun slightly;
function f = ofun(x) % objective function (minimization)
of =2.6773*x(1)+3.1007*x(2)+3.2178*x(3)+ 3.8021*x(4)+3.6727*x(5)+3.0442*x(6)+1.6362*x(7)+3.0479*x(8)+3.3917*x(9)+3.7468*x(10)+3.8989*x(11)+3.1073*x(12)+3.3207*x(13)+ 1.6382*x(14);
% if there is no constraints then comments all c0 lines below
c0 = zeros(1,0, 'like', x);
CTI =0.3;
A(1) =2.6773*x(1); B(1) =4.2191*x(6); %first row
A(2) =3.1007*x(2); B(2) =5.0777*x(1); %second row
A(3) =3.1007*x(2); B(3) =2.1891*x(7); %third row
A(4) =3.2178*x(3); B(4) =3.9908*x(2); %fourth row
A(5) =3.8021*x(4); B(5) =4.1278*x(3); %fifth row
A(6) =3.6727*x(5); B(6) =5.0785*x(4); %sixth row
A(7) =3.0442*x(6); B(7) =5.8436*x(5); %seventh row
A(8) =1.6362*x(7); B(8) =5.8436*x(5); %eighth row
A(9) =3.0442*x(6); B(9) =2.1962*x(14); %nighth row
A(10)=1.6362*x(7); B(10)=7.3310*x(13); %tenth row
A(11)=3.0479*x(8); B(11)=2.1891*x(7); %eleventh row
A(12)=3.0479*x(8); B(12)=5.4250*x(9); %tweleventh row
A(13)=3.3917*x(9); B(13)=4.9527*x(10); %thirteenth row
A(14)=3.7468*x(10); B(14)=5.2862*x(11); %fourteenth row
A(15)=3.8989*x(11); B(15)=3.8989*x(12); %fiveteenth row
A(16)=3.1073*x(12); B(16)=7.3310*x(13); %sixteenth row
A(17)=3.1073*x(12); B(17)=2.1962*x(14); %seventennth row
A(18)=3.3207*x(13); B(18)=4.4351*x(8); %eighteenth row
A(19)=1.6382*x(14); B(19)=5.0777*x(1); %nighnteenth row
A(20)=1.6382*x(14); B(20)=5.4250*x(9); % twenty row
c0(1)= B(1) -A(1)-CTI;
c0(2)= B(2) -A(2)-CTI;
c0(3)= B(3) -A(3)-CTI;
c0(4)= B(4) -A(4)-CTI;
c0(5)= B(5) -A(5)-CTI;
c0(6)= B(6) -A(6)-CTI;
c0(7)= B(7) -A(7)-CTI;
c0(8)= B(8) -A(8)-CTI;
c0(9)= B(9) -A(9)-CTI;
c0(10)= B(10)-A(10)-CTI;
c0(11)= B(11)-A(11)-CTI;
c0(12)= B(12)-A(12)-CTI;
c0(13)= B(13)-A(13)-CTI;
c0(14)= B(14)-A(14)-CTI;
c0(15)= B(15)-A(15)-CTI;
c0(16)= B(16)-A(16)-CTI;
c0(17)= B(17)-A(17)-CTI;
c0(18)= B(18)-A(18)-CTI;
c0(19)= B(19)-A(19)-CTI;
c0(20)= B(20)-A(20)-CTI;
if isa(x, 'sym')
D = arrayfun(@(C) piecewise(C < 0, -C*1000, C), c0);
else
D = c0;
mask = D < 0;
D(mask) = -1000*D(mask);
end
Z = sum(D);
f=of+Z; % fitness function
end
  댓글 수: 2
Walter Roberson
Walter Roberson 2021년 10월 4일
You posted your entire code, and that code did not have a call
func(GBEST);
If you want to know the value of the function at the best location, just examine
GBEST.O
and the best location found is
GBEST.X

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추가 답변 (2개)

tahseen alshmary
tahseen alshmary 2021년 10월 4일
Thank you so much

tahseen alshmary
tahseen alshmary 2021년 10월 4일
편집: Walter Roberson 2021년 10월 4일
what do you mean
the full objective function below
of =2.6773*x(1)+3.1007*x(2)+3.2178*x(3)+ 3.8021*x(4)+3.6727*x(5)+3.0442*x(6)+1.6362*x(7)+3.0479*x(8)+3.3917*x(9)+3.7468*x(10)+3.8989*x(11)+3.1073*x(12)+3.3207*x(13)+ 1.6382*x(14);
% if there is no constraints then comments all c0 lines below
c0=[];
CTI =0.3;
A(1) =2.6773*x(1); B(1) =4.2191*x(6); %first row
A(2) =3.1007*x(2); B(2) =5.0777*x(1); %second row
A(3) =3.1007*x(2); B(3) =2.1891*x(7); %third row
A(4) =3.2178*x(3); B(4) =3.9908*x(2); %fourth row
A(5) =3.8021*x(4); B(5) =4.1278*x(3); %fifth row
A(6) =3.6727*x(5); B(6) =5.0785*x(4); %sixth row
A(7) =3.0442*x(6); B(7) =5.8436*x(5); %seventh row
A(8) =1.6362*x(7); B(8) =5.8436*x(5); %eighth row
A(9) =3.0442*x(6); B(9) =2.1962*x(14); %nighth row
A(10)=1.6362*x(7); B(10)=7.3310*x(13); %tenth row
A(11)=3.0479*x(8); B(11)=2.1891*x(7); %eleventh row
A(12)=3.0479*x(8); B(12)=5.4250*x(9); %tweleventh row
A(13)=3.3917*x(9); B(13)=4.9527*x(10); %thirteenth row
A(14)=3.7468*x(10); B(14)=5.2862*x(11); %fourteenth row
A(15)=3.8989*x(11); B(15)=3.8989*x(12); %fiveteenth row
A(16)=3.1073*x(12); B(16)=7.3310*x(13); %sixteenth row
A(17)=3.1073*x(12); B(17)=2.1962*x(14); %seventennth row
A(18)=3.3207*x(13); B(18)=4.4351*x(8); %eighteenth row
A(19)=1.6382*x(14); B(19)=5.0777*x(1); %nighnteenth row
A(20)=1.6382*x(14); B(20)=5.4250*x(9); % twenty row
  댓글 수: 10
Walter Roberson
Walter Roberson 2021년 10월 4일
편집: Walter Roberson 2021년 10월 4일
Mathworks does not supply a function named PSO . The Mathworks particle swarm function is named particleswarm()
So we would need to know where you found the PSO.m function .

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