storing a code in a for loop

hi, could anyone help me here? i've been given a task to store the code attached into one big for loop which executes the code and runs it all in one go then gives the image from the frames in the code. How can i do this?

clc
clear all

f=1;
N = 330;
M = nan(156,206,N);
for ii = 1:N
    M(:,:,ii) = load(sprintf('frames_%d.txt',ii-1));
end
b=load('timestamp.txt');

for i=2:N
    b(1)=0;
b(i)=b(i)+b(i-1);
end

c=b(1:N);

% b=b';

% MM=M(:,:,1:length(t));
% t=(0:2970)/33;
% MM=M(:,:,1:length(t));
% f=2;
% for i=1:156
%     for j=1:207
%         I(i,j,:)=squeeze(MM(i,j,:))'.*sin(2*pi*f.*t);
%         Q(i,j,:)=squeeze(MM(i,j,:))'.*cos(2*pi*f.*t);
%     end
% end


for i=1:N
    
        I(:,:,i)=squeeze(M(:,:,i))'.*sin(2*pi*f.*c(i));
        Q(:,:,i)=squeeze(M(:,:,i))'.*cos(2*pi*f.*c(i));
end

II=sum(I,3);

QQ=sum(Q,3);
Amp=sqrt(II.^2+QQ.^2);dlk 
figure; imagesc(Amp)

Answer 1

[Subhajyoti]

Hi @tina,

It is my understanding that you are trying to combine all the looped-operations into a single loop.

You can combine the code into a single loop, by integrating the operations that depend on the loop index. Here, in the following implementation, I have implemented the same while optimizing redundant operations.

f=1;
N = 330;
M = nan(156,206,N);

b=load('timestamp.txt');
b(1)=0;

c=0;

for ii = 1:N
    M = load(sprintf('frames_%d.txt',ii-1));

    if(ii>1)
        c = c + b(ii);     
    end

    I(:,:,ii)=squeeze(M)'.*sin(2*pi*f.*c);
    Q(:,:,ii)=squeeze(M)'.*cos(2*pi*f.*c);
end

II=sum(I,3);

QQ=sum(Q,3);
Amp=sqrt(II.^2+QQ.^2);dlk
figure; imagesc(Amp)

Additionally, you can also refer to the following resource to know more about loop-controls in MATLAB:

https://www.mathworks.com/help/matlab/matlab_prog/loop-control-statements.html