This is what it is suppose to be
[1, 1, 1.5] [1, 1, 1.5, 2.25] [1, 1, 1.5, 2.25, 3.125] [1, 1, 1.5, 2.25, 3.125, 4.06] [1, 1, 1.5, 2.25, 3.125, 4.06, 5.03] The model below is what I want to implement.I chose alpha to be 0.5. The model below chose 0.3. What is Exponential Smoothing? - A type of weighted moving averaging model - Part of many forecasting packages; ideal for developing forecasts of lots of smaller items - Needs only three numbers: Ft-1 = Forecast for the period before current time period t At-1 = Actual demand for the period before current time period t *a* = Weight between 0 and 1 - Formula - As a gets closer to 1, the more weight put on the most recent demand number Exponential Smoothing Forecaset with a = .3 On Wed, Aug 24, 2016 at 5:53 PM, Joaquin Alzola <joaquin.alz...@lebara.com> wrote: > >I want the elements of ft to increment by one while I use it to generate > the subsequent element. But for some reasons I don't understand, it keeps > changing the second element in Ft. > > >yt = [1,2,3,4,5,6] > > >ft = [yt[0],yt[0]] > >alpha = 0.5 > >while len(ft) != len(yt) + 1: > > > ft.append(ft[1] + alpha * (yt[1] - ft[1])) > > > print(ft) > > ft[1] += 1 > > yt[1] += 1 > >print (ft) > > Right now your output is: > [1, 1, 1.5] > [1, 2, 1.5, 2.5] > [1, 3, 1.5, 2.5, 3.5] > [1, 4, 1.5, 2.5, 3.5, 4.5] > [1, 5, 1.5, 2.5, 3.5, 4.5, 5.5] > [1, 6, 1.5, 2.5, 3.5, 4.5, 5.5] > > What do you want it to be? > This email is confidential and may be subject to privilege. If you are not > the intended recipient, please do not copy or disclose its content but > contact the sender immediately upon receipt. > _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
