I don't understand what the following sum function does.
mA is a column vector, so what does mA(1) mean?
The documentation for the sum function indicates that taking the sum of a vector just results in one value which is the sum of all of the values in the vector. Is that also what happens when you take the sum of a single row in a matrix (sum(cA(1,:)))? So is mA(1) equal to a single value? I can't seem to find out what mA(1) means for a vector.