Cumulative sum over all timesteps
timcumsum.RdThe timcumsum operator calculates the cumulative sum over all timesteps. Missing values are treated as numeric zero when summing. o(t,x) = sum{i(t',x), 0<t'<=t}
timcumsum.RdThe timcumsum operator calculates the cumulative sum over all timesteps. Missing values are treated as numeric zero when summing. o(t,x) = sum{i(t',x), 0<t'<=t}