MATLAB: Saving data from nested for loop

for loopnested loops

Hi
I want to store data from a nested for loop and this is my code
%%Initialisation 1 
delta_x=(2*pi)/100;
delta_y=delta_x;
H=2*pi;
L=4*pi;
 
%Mesh 
n=(L/delta_x)+1; Converts rectangle to a mesh
m=(H/delta_y)+1;
x=[0:delta_x:n]';
y=[0:delta_y:m]';
for i=x(2):delta_x:x(end-1) 
   for j=y(2):delta_y:y(end-1)
        pointer=[(j-1)*n+i];        
   end
end
Everytime the pointer runs it only gives me the latest iteration and not all the iterations like I want. I tried putting (i,j) before it but that was to no avail and now am at my wits end as to what to do. Any help would be much appreciated

Best Answer

Give this a shot. It's usually best to set up for-loops to iterate over integer values 1 to n. Those integer values can be used to index input values and store the outputs. 
iLoop = x(2):delta_x:x(end-1); 
jLoop = y(2):delta_y:y(end-1); 
pointer = nan(numel(iLoop), numel(jLoop)); 
for i = 1:numel(iLoop)
    for j = 1:numel(jLoop)
        pointer(i,j)=(jLoop(j)-1)*n+iLoop(i);
    end
end
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