A chord group for a given node i representing the combined outflow for node i, corresponding to the elements matrix[i][0 … n - 1].
The end angle of the chord group in radians
The node index i
The start angle of the chord group in radians
The total outgoing flow value for node i
A chord group for a given node i representing the combined outflow for node i, corresponding to the elements matrix[i][0 … n - 1].