Index exceeds matrix dimensions.

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Dear sirs

i have problem with this code . can any one help me

error

Index exceeds matrix dimensions.
Error in Untitled3 (line 47)
CTI1 = A(1,1)*x(1)+A(1,6)*x(6)

the code

%To minimize our fitness function using the ga function, we need to pass in a function 
% handle to the fitness function as well as specifying the number of variables as the 
% second argument. Lower and upper bounds are provided as LB and UB respectively. In 
% addition, we also need to pass in a function handle to the nonlinear constraint function.
tic
clear 
clc
ObjectiveFunction = @simple_fitness;
nvars = 14;                                                     % Number of variables
% Lower bound for (x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14)
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]; 
% Upper 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 ]; 
 A=zeros(20,14); b=zeros(20,1);
 A(1,1)=+2.174;     A(1,6)=-1.777;   b(1)=-0.3;  %first row
 A(2,1)=-3.555;    A(2,2)=+1.159;    b(2)=-0.3;  %second row
 A(3,2)=+1.159;     A(3,7)=-2.137;   b(3)=-0.3;  %third row
 A(4,2)=-1.272;    A(4,3)=+2.880;    b(4)=-0.3;  %fourth row
 A(5,3)=-3.593;    A(5,4)=+3.043;    b(5)=-0.3;  %fifth row
 A(6,4)=-3.818;    A(6,5)=+1.402;    b(6)=-0.3;  %sixth row
 A(7,5)=-1.650;    A(7,6)=+1.519;    b(7)=-0.3;  %seventh row
 A(8,5)=-1.650;    A(8,7)=+1.606;    b(8)=-0.3;  %eighth row
 A(9,6)=+1.519;     A(9,14)=-2.143;  b(9)=-0.3;  %nighth row
 A(10,7)=+1.606;    A(10,13)=-2.629; b(10)=-0.3; %tenth row
 A(11,7)=-2.137;   A(11,8)=+1.806;   b(11)=-0.3; %eleventh row
 A(12,8)=+1.806;    A(12,9)=-1.622;  b(12)=-0.3; %tweleventh row
 A(13,9)=+1.948;    A(13,10)=-3.605; b(13)=-0.3; %thirteenth row
 A(14,10)=+2.753;   A(14,11)=-3.935; b(14)=-0.3; %fourteenth row
 A(15,11)=+3.105;   A(15,12)=-1.287; b(15)=-0.3; %fiveteenth row
 A(16,12)=+1.181;   A(16,13)=-2.629; b(16)=-0.3; %sixteenth row
 A(17,12)=+1.181;   A(17,14)=-2.143; b(17)=-0.3; %seventennth row
 A(18,8)=-2.232;   A(18,13)=+1.816;  b(18)=-0.3; %eighteenth row
 A(19,1)=-3.555;   A(19,14)=+1.608;  b(19)=-0.3; %nighnteenth row
 A(20,9)=-1.622;   A(20,14)=+1.608;  b(20)=-0.3; %twinty row
Aeq=[];
beq=[];
nonlcon=[];
IntCon=[];
rng default % For reproducibility
options=gaoptimset('plotfcns',{'gaplotgenealogy','gaplotselection', 'gaplotbestf' ...
     ,@gaplotscorediversity});
options= gaoptimset(options,'Tolfun',1e-6,'TolCon',1e-3,'stallGenlimit',50);
options= gaoptimset(options,'MutationFcn',{@mutationadaptfeasible});
options=gaoptimset(options,'PopulationSize',200);
options=gaoptimset(options,'PopulationType','doubleVector');
options=gaoptimset(options,'CrossoverFcn',{@crossoverarithmetic});
options=gaoptimset(options,'Display', 'iter');
[x,fval,exitflag,output,population,scores] ...
=  ga(ObjectiveFunction,nvars,A,b,Aeq,beq,LB,UB,nonlcon,IntCon,options)
toc
CTI1 = A(1,1)*x(1)+A(1,6)*x(6)
CTI2 = A(2,1)*x(1)+ A(2,2)*x(2)
CTI3 = A(3,2)*x(2)+ A(3,7)*x(7)
CTI4 = A(4,2)*x(2)+ A(4,3)*x(3)
CTI5 = A(5,3)*x(3)+ A(5,4)*x(4)
CTI6 = A(6,4)*x(4)+ A(6,5)*x(5)
CTI7 = A(7,5)*x(5)+ A(7,6)*x(6)
CTI8 = A(8,5)*x(5)+ A(8,7)*x(7)
CTI9 = A(9,6)*x(6)+ A(9,14)*x(14)
CT10 = A(10,7)*x(7)+ A(10,13)*x(13)
CTI11= A(11,7)*x(7)+ A(11,8)*x(8)
CTI12= A(12,8)*x(8)+ A(12,9)*x(9)
CTI13= A(13,9)*x(9)+ A(13,10)*x(10)
CTI14= A(14,10)*x(10)+ A(14,11)*x(11)
CTI15= A(15,11)*x(11)+ A(15,12)*x(12)
CTI16= A(16,12)*x(12)+ A(16,13)*x(13)
CTI17= A(17,12)*x(12)+ A(17,14)*x(14)
CTI18= A(18,8)*x(8)+ A(18,13)*x(13)
CTI19= A(19,1)*x(1)+ A(19,14)*x(14)
CTI20= A(20,9)*x(9)+ A(20,14)*x(14) 