Eviews D functions

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Eoghan
Posts: 11
Joined: Sun Mar 19, 2017 7:23 am

Eviews D functions

Postby Eoghan » Sun May 14, 2017 9:25 am

I have two variables RGDP and WAGES
I'm supposed to generate two new series D_RGDP and D_WAGES using eviews D functions:
D(X) = X-X(-1)
D(X) = X(t)-X(t-1)

t and t-1 are subscripts

what would be the commands to do this?
I get syntax error/(-1) not good when i try genr series d_rgdp = grgdp-grgdp(-1) for the first one
and I'm not sure at all how to generate the second one with my variables

startz
Non-normality and collinearity are NOT problems!
Posts: 3384
Joined: Wed Sep 17, 2008 2:25 pm

Re: Eviews D functions

Postby startz » Sun May 14, 2017 9:41 am

Eoghan wrote:I have two variables RGDP and WAGES
I'm supposed to generate two new series D_RGDP and D_WAGES using eviews D functions:
D(X) = X-X(-1)
D(X) = X(t)-X(t-1)

t and t-1 are subscripts

what would be the commands to do this?
I get syntax error/(-1) not good when i try genr series d_rgdp = grgdp-grgdp(-1) for the first one
and I'm not sure at all how to generate the second one with my variables

any of

Code: Select all

genr d_rgdp = grgdp-grgdp(-1)
series d_rgdp = grgdp-grgdp(-1)
series d_rgdp = d(grgdp)


Just don't say both genr and series.

Eoghan
Posts: 11
Joined: Sun Mar 19, 2017 7:23 am

Re: Eviews D functions

Postby Eoghan » Sun May 14, 2017 9:47 am

thanks, how would I then do the one with the D(X)=Xt-Xt-1 for wages

startz
Non-normality and collinearity are NOT problems!
Posts: 3384
Joined: Wed Sep 17, 2008 2:25 pm

Re: Eviews D functions

Postby startz » Sun May 14, 2017 9:51 am

Eoghan wrote:thanks, how would I then do the one with the D(X)=Xt-Xt-1 for wages

Code: Select all

series d_wages = d(wages)

Eoghan
Posts: 11
Joined: Sun Mar 19, 2017 7:23 am

Re: Eviews D functions

Postby Eoghan » Sun May 14, 2017 9:55 am

I thought they were two different commands?
or are they the same then?
D(X)=X-X(-1) verse D(X)=Xt-Xt-1

startz
Non-normality and collinearity are NOT problems!
Posts: 3384
Joined: Wed Sep 17, 2008 2:25 pm

Re: Eviews D functions

Postby startz » Sun May 14, 2017 10:28 am

In EViews a number in parentheses gives a lag. You don't explicitly put in the t.

Eoghan
Posts: 11
Joined: Sun Mar 19, 2017 7:23 am

Re: Eviews D functions

Postby Eoghan » Sun May 14, 2017 10:34 am

ah ok, thank you!
Do you know how I would run 10 forecasts using 200 observations each
this is to help calculate MAPE and RMSE

startz
Non-normality and collinearity are NOT problems!
Posts: 3384
Joined: Wed Sep 17, 2008 2:25 pm

Re: Eviews D functions

Postby startz » Sun May 14, 2017 10:50 am

That sort of thing depends on exactly what you're trying to do. You might want to read some of the online tutorials or EViews Illustrated to get a head start on how to use EViews tools.


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