MATLAB: Double indexed variable (new user)

double indexed variables

I am very new to Matlab. I am trying to create ixj number of variables using the function below. I am getting an error message for pos(i,j) = [b/2+partsize/2+(i-1)*(b+partsize), b/2+partsize/2+(j-1)*(b+partsize)] line. How do I create indexed variables that I can call later in Matlab? Here pos(i,j)==> 1×2 vector (x and y coordinates) e.g I expect to obtain something like the following: pos (1,1)= [ 2 2] pos ( 1,2) = [2 4] pos ( 2,1) = [4 2] pos (2, 2) = [4 4] etc.
function b= posgen(cellsize, particleno, partsize)
partnoline =(particleno)^(1/2);
b= (cellsize-partnoline*partsize)/partnoline;
for i=1:partnoline;
    for j=1:partnoline;
    pos(i,j)  = [b/2+partsize/2+(i-1)*(b+partsize), b/2+partsize/2+(j-1)*(b+partsize)]
    end
end
What am I doing wrong? Can you help please

Best Answer

Numeric arrays cannot have multiple elements (e.g., x and y) at a location. Use an additional dimension, or use cell arrays.
pos(i,j,:)  = [b/2+partsize/2+(i-1)*(b+partsize), b/2+partsize/2+(j-1)*(b+partsize)];
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