[Tutor] I Need Help

[Micheal Emeagi]

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.Alzola at 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?
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