Index exceeds array bound help

Hi everyone. I'm implementing image encoding with chaotic mapping with three keys for: bit permutation, row permutation, pixel permutation. I made a mistake: Index exceeds array bound. Please help me. Also, outside is the lock, I want to run the loop inside the command a number of times, how do I do? Thanks so much. This is my code:

clc;
clear variables;
c=imread('E:\_temp_matlab_R2018a_win64\bin\code_chaotic\kaola280.png');
[heigth,width,~]=size(c);
%HOAN VI BIT

%tao chuoi chaotic, sap xep de hoan vi diem anh theo thu tu sap xep cua
%chao
%tao khoa hoan vi tu ham chaotic
y=zeros(1,8);
% nhap cac gia tri khoi tao cho chaotic map
y(1)=0.6;
beta=3.7;
for i=2:8
    y(i)=beta*y(i-1)*(1-y(i-1));
end
fprintf('\n chao:\n');
disp(y);
%sap xep chao
chaoswapp=y;
for i=1:7-1
    for j=i+1:8
        if chaoswapp(i)>chaoswapp(j)
            temp=chaoswapp(i);
            chaoswapp(i)=chaoswapp(j);
            chaoswapp(j)=temp;
        end
    end
end
% % fprintf('\n chao:\n');
% % disp(y);
fprintf('\n chao sap xep:\n');
disp(chaoswapp);
% disp(chaoswapp);
%tao khoa hoan vi bit
key=zeros(1,8);
k=1;
t=1;

while k<=width
    i=1; 
    while y(i)~=chaoswapp(k)
         i=i+1;
     end
     key(t)=i;
     t=t+1;
     k=k+1;
end
fprintf('\n khoa hoan vi chao:\n');
disp(key);
% key=[3 5 1 7 2 8 4 6];%randperm(8);
n=24*width*heigth;
binary=zeros(1,n);
%chuyen anh ban dau sang dang nhi phan
k=1;
for i=1:heigth
    for j=1:width
        tmpr=dec2bin(c(i,j,1),8);
        tmp=zeros(1,8);
        for t=1:8
            if tmpr(t)=='1'
                tmp(t)=1;
            end
        end
        for p=1:8
            binary(k)=tmp(key(p));
            k=k+1;
        end

          tmpg=dec2bin(c(i,j,2),8);
          tmp=zeros(1,8);
          for t=1:8
              if tmpg(t)=='1'
              tmp(t)=1;
              end
          end

          for p=1:8
              binary(k)=tmp(key(p));
              k=k+1;
          end
          tmpb=dec2bin(c(i,j,3),8);
          tmp=zeros(1,8);
          for t=1:8
              if tmpb(t)=='1'
                  tmp(t)=1;
              end
          end

          for p=1:8
              binary(k)=tmp(key(p));
              k=k+1;
          end        
      end
  end

%chuyen chuoi nhi phan da hoan vi ve thap phan
column=length(binary)/8;
binmatrix=zeros(8,column);
k=1;
for i=1:column
    for j=1:8
        binmatrix(j,i)=binary(k);
        k=k+1;
    end
end
%chuyen ma tran nhi phan thanh dang thap phan
binvalue=[128 64 32 16 8 4 2 1];
pixel=binvalue*binmatrix;%vector hang cac diem anh//////////////

%xay dung lai anh sau khi xao tron bang cach hoan vi
anhhoanvi=c;%zeros(heigth,width);
k=1;
for i=1:heigth
    for j=1:width
        anhhoanvi(i,j,1)=pixel(k);
        k=k+1;
        anhhoanvi(i,j,2)=pixel(k);
        k=k+1;
        anhhoanvi(i,j,3)=pixel(k);
        k=k+1;
    end
end
imwrite(anhhoanvi,'E:\_temp_matlab_R2018a_win64\bin\code_chaotic\hoanvibitkaola280.png');
%xong hoan vi bit
%HOAN VI CAC DIEM ANH THEO TUNG HANG
%tao chuoi chaotic, sap xep de hoan vi diem anh theo thu tu sap xep cua
%chao
%tao khoa hoan vi tu ham chaotic
x=zeros(1,width);
% nhap cac gia tri khoi tao cho chaotic map
x(1)=0.4;
lamda=3.7;
for i=2:width
    x(i)=lamda*x(i-1)*(1-x(i-1));
end
fprintf('\n chao:\n');
disp(x);
%sap xep chao
chaoswap=x;
for i=1:width-1
    for j=i+1:width
        if chaoswap(i)>chaoswap(j)
            temp=chaoswap(i);
            chaoswap(i)=chaoswap(j);
            chaoswap(j)=temp;
        end
    end
end
% % fprintf('\n chao:\n');
% % disp(x);
fprintf('\n chao sap xep:\n');
disp(chaoswap);
% disp(chaoswap);
%tao khoa hoan vi hang
key1=zeros(1,width);
k=1;
t=1;

while k<=width
    i=1; 
    while x(i)~=chaoswap(k)
         i=i+1;
     end
     key1(t)=i;
     t=t+1;
     k=k+1;
end
fprintf('\n khoa hoan vi chao:\n');
disp(key1);
%tao khoa nguoc hoan vi hang
key2=zeros(1,width);
for i=1:width
    key2(key1(i))=i;
end
fprintf('\n khoa hoan vi nguoc cua chao:\n');
disp(key2);
% hoan vi cacs diem anh////////////////////
hoanvihang=anhhoanvi;
for i=1:heigth
    for j=1:width
        hoanvihang(i,j,1)=anhhoanvi(i,key1(j),1);
        hoanvihang(i,j,2)=anhhoanvi(i,key1(j),2);
        hoanvihang(i,j,3)=anhhoanvi(i,key1(j),3);
    end
end
%imshow(hoanvihang);
imwrite(hoanvihang,'E:\_temp_matlab_R2018a_win64\bin\code_chaotic\hoanvihangkaola280.png');
%KET THUC HOAN VI HANG
%HOAN VI KHOI
b=cell(1,8);
k=1;
blockwidth=width/4;
blockheigth=heigth/2;
gridwidth=width/blockwidth;
gridheigth=heigth/blockheigth;
for i=1:gridheigth
    for j=1:gridwidth
        %toa do cua diem anh dau tien cua khoi con
        cx=(i-1)*blockheigth+1;
        cy=(j-1)*blockwidth+1;
        %lay vi tri cua cac diem anh trong khoi
        posx=cx:cx+blockheigth-1;
        posy=cy:cy+blockwidth-1;
        %tao khoi con
        b{k}=hoanvihang(posx,posy); %de truy cap den tung phan tu cua cell, dung {}
        k=k+1;
    end
end

hoanvikhoi=b;
for i=1:8
    hoanvikhoi{i}=b{key(i)};
end
%ghep khoi de chuyen ve anh
anhhoanvikhoi=hoanvihang;
k=1;
for i=1:gridheigth
    for j=1:gridwidth
        %toa do cua diem anh dau tien cua khoi con
        cx=(i-1)*blockheigth+1;
        cy=(j-1)*blockwidth+1;
        %lay vi tri cua cac diem anh trong khoi
        posx=cx:cx+blockheigth-1;
        posy=cy:cy+blockwidth-1;
        %tao khoi con
        anhhoanvikhoi(posx,posy)=hoanvikhoi{k};
        k=k+1;
    end
end
imwrite(anhhoanvikhoi,'E:\_temp_matlab_R2018a_win64\bin\code_chaotic\hoanvikhoikaola280.png');

subplot(6,1,1);
imhist(c(:,:,1));
subplot(6,1,3);
imhist(c(:,:,2));
subplot(6,1,5);
imhist(c(:,:,3));

% subplot(3,1,1);
% imhist(anhhoanvi(:,:,1));
% subplot(3,1,2);
% imhist(anhhoanvi(:,:,2));
% subplot(3,1,3);
% imhist(anhhoanvi(:,:,3));

% subplot(3,2,1);
% imhist(hoanvihang(:,:,1));
% subplot(3,2,2);
% imhist(hoanvihang(:,:,2));
% subplot(3,2,3);
% imhist(hoanvihang(:,:,3));

    subplot(6,1,2);
    imhist(anhhoanvikhoi(:,:,1));
    subplot(6,1,4);
    imhist(anhhoanvikhoi(:,:,2));
    subplot(6,1,6);
    imhist(anhhoanvikhoi(:,:,3));

[Jan]

[MOVED from flags] Huong Hoang wrote: Hi Administrator. Please consider my question. Thank you.

@Huong Hoang: Please use flags only to inform admins and editors about inappropriate content like spam or rudeness. Trying to push the readers to prefer you question to others is not useful.

Please post the complete error message, such that it is clear, which line causes the error.