make shaded graph for forecasting

[ch2324]

Hi everybody,
how can make shaded graph for forecasting like this picture.

[EViews Gareth]

This is a fan chart.

The EViews blog will have a post on creating fan charts soon!

[ch2324]

great! :D thanks! Mr Gareth.

[ch2324]

Hi,
First of all, i would to think EViews team for all their efforts to make this Add-in ;
i have data frequency weekly named gas, so i want to make fanchart for my data the problem i use the Add-in but can give me a result, and i have use the program in the blog to make mode, skewness and uncertainty. but i get error mesage: Error in Sample: MODE is not defined in "SMPL IF MODE<>NA".
could you just explain in few line the steps for this.


Best CHERIF.

[EViews Gareth]

Slight bug in the add-in, it will be fixed.

[EViews Gareth]

It has been updated.

[ch2324]

ok, but i have no idea what is the problem i can't get mode, skewness and uncertainty series, or in first create it in the workfile, and next use the Add-in.
(*)the prg calcquant i use it in the first to generate mode, skewness and uncertainty.
could you exmplain please i have no idea to use this Add-in :(

[EViews Gareth]

I'm not sure what there is to explain. In order to calculate a Bank of England style fan chart, you need to have the mode, uncertainty and skewness values of your forecast.

The add-in does not calculate those for you, it uses them as inputs.

[ch2324]

i understand now, so the calcquant prg are the way to make mode, skewness and uncertainty.
thanks for you help :)

[tvonbrasch]

Hi Gareth,

how do i use the fanchart addin using program code?

i tried

Code: Select all

cpi.fan mode uncertainty skewness

but then the option menu came up?

can you also give the precise link to where BoE explains the skewness and uncertainty series?
Thomas

[EViews Gareth]

There is no command line interface to this add-in. You're better off stealing the source code and adding it to your own program to suit your needs.

This paper (although not a BoE paper) explains the methodology well:
http://www.banrep.gov.co/docum/ftp/borra468.pdf