multiple simulation runs for random walk

I am having trouble running multiple simulations of a random walk situation. Although I have put it into a for loop, I am having trouble making it work.

n = 10001;
for k = 1:n
    result = zeros(n,1);
   for z = 2:1001     
    w = rand(1001,1);       
    if (w(z) >= .5)         
        Left(z) = Left(z-1) + 1;
        Right(z) = Right(z-1);
    else 
        Right(z) = Right(z-1) + 1;
        Left(z) = Left(z-1);
    end
end
      Y = Left - Right;
end
 result(k) = Y;

I previously got help with this not too long ago, and I was told to put the assignment for the result in the outer for loop, but then I started getting different issues with result(k) and Y not being the same size. It would be great if I could get an explanation of how to fix this.

Answer 1

[KALYAN ACHARJYA]

I have read your previous question, there @Walter sir suggested to keep the result within the outer loop, as follows, still if you face the issue, let me know

n = 10001;
for k = 1:n
    result = zeros(n,1);
   for z = 2:1001     
    w = rand(1001,1);       
    if (w(z) >= .5)         
        Left(z) = Left(z-1) + 1;
        Right(z) = Right(z-1);
    else 
        Right(z) = Right(z-1) + 1;
        Left(z) = Left(z-1);
    end
end
      Y = Left - Right;
      result(k) = Y;
end 

[madhan ravi]

it shows error:

Undefined function 'Right' for input arguments of type 'double'.

[Chase Lee]

Yeah I tried the fix that you suggested, but now I get another error from the result(k) = Y line that says "Unable to perform assignment because the left and right sides have a different number of elements." Any explanation would be appreciated.