怎么修改下面这段matlab程序？望指教

[hmily1226]

下面这段代码是实数编码求函数极大值程序，怎么把它改成求函数f(x)=10*sin(5x)+7*cos(4x) x∈[0,10]的极大值？我不会换函数，望指教，比较急，也没学过算法，数学基础薄，希望大家帮帮忙，谢谢
遗传算法十进制编码求函数F(i)=100*(x1^2-x2)^2+(1-x1)^2;极大值程序
%Generic Algorithm for function f(x1,x2) optimum
clear all;
close all;

Size=500;
CodeL=2;

MinX(1)=-2.048;
MaxX(1)=2.048;
MinX(2)=-2.048;
MaxX(2)=2.048;

E(:,1)=MinX(1)+(MaxX(1)-MinX(1))*rand(Size,1);
E(:,2)=MinX(2)+(MaxX(2)-MinX(2))*rand(Size,1);

G=200;
BsJ=0;

%*************** Start Running ***************
for kg=1:1:G
time(kg)=kg;

%****** Step 1 : Evaluate BestJ ******
for i=1:1:Size
xi=E(i,:);
x1=xi(1);
x2=xi(2);

F(i)=100*(x1^2-x2)^2+(1-x1)^2;

Ji=1./F;
BsJi(i)=min(Ji);

end

[OderJi,IndexJi]=sort(BsJi);
BestJ(kg)=OderJi(1);
BJ=BestJ(kg);
Ji=BsJi+1e-10; %Avoiding deviding zero

fi=F;

[Oderfi,Indexfi]=sort(fi); %Arranging fi small to bigger
Bestfi=Oderfi(Size); %Let Bestfi=max(fi)
BestS=E(Indexfi(Size),:); %Let BestS=E(m), m is the Indexfi belong to max(fi)

bfi(kg)=Bestfi;

kg
BestS
%****** Step 2 : Select and Reproduct Operation******
fi_sum=sum(fi);
fi_Size=(Oderfi/fi_sum)*Size;

fi_S=floor(fi_Size); % Selecting Bigger fi value
r=Size-sum(fi_S);

Rest=fi_Size-fi_S;
[RestValue,Index]=sort(Rest);

for i=Size:-1:Size-r+1
fi_S(Index(i))=fi_S(Index(i))+1; % Adding rest to equal Size
end

k=1;
for i=Size:-1:1 % Select the Sizeth and Reproduce firstly
for j=1:1:fi_S(i)
TempE(k,:)=E(Indexfi(i),:); % Select and Reproduce
k=k+1; % k is used to reproduce
end
end

%************ Step 3 : Crossover Operation ************
Pc=0.90;
for i=1:2:(Size-1)
temp=rand;
if Pc>temp %Crossover Condition
alfa=rand;
TempE(i,:)=alfa*E(i+1,:)+(1-alfa)*E(i,:);
TempE(i+1,:)=alfa*E(i,:)+(1-alfa)*E(i+1,:);
end
end
TempE(Size,:)=BestS;
E=TempE;

%************ Step 4: Mutation Operation **************
Pm=0.10-[1:1:Size]*(0.01)/Size; %Bigger fi,smaller Pm
Pm_rand=rand(Size,CodeL);
Mean=(MaxX + MinX)/2;
Dif=(MaxX-MinX);

for i=1:1:Size
for j=1:1:CodeL
if Pm(i)>Pm_rand(i,j) %Mutation Condition
TempE(i,j)=Mean(j)+Dif(j)*(rand-0.5);
end
end
end
%Guarantee TempE(Size,:) belong to the best individual
TempE(Size,:)=BestS;
E=TempE;
end
BestS
Bestfi

figure(1);
plot(time,BestJ,'k');
xlabel('Times');ylabel('Best J');

figure(2);
plot(time,bfi,'k');
xlabel('times');ylabel('Best F');