MATLAB does not allow an index origin of zero. This means that the FIRST element in a vector, for example, is indexed at number 1. The zero'th element does not exist in a matrix, at least not in MATLAB. So, for example, if I do this:
x = zeros(1,5);
for i = 1:5
x(i) = i;
end
x
x(1)
And as you can see, x(1) is that first element.
