EViews.com

Posted: **Tue Apr 13, 2010 9:16 am**

Hi,

I have a series x and, say, 4 sample periods. I want to create a series y that is the linear interpolation of the beginning and end-points of the samples.

Code: Select all


sample s1 1980 1990
sample s2 1990 1998
sample s3 1998 2002
sample s4 2002 2009

for !ss=1 to 4
smpl s{!ss}
series temp=@recode([if index=1 or last],x,na)
y.ipolate temp
delete temp
next !ss

The code above shows roughly the idea but I don't know 1) how to combine @recode with an "index" that goes from 1 to the total sample observations, or whether this is possible; 2) if y will contain the four "lines" (or if every time y.ipolate is used it creates a new series - and fills with NAs everything outside of the sample period).

Could you please help?

Thanks,

Javier

Posted: **Tue Apr 13, 2010 9:50 am**

There's probably an easier way than this, but I think this works:

Code: Select all


sample s1 1980 1990
sample s2 1990 1998
sample s3 1998 2002
sample s4 2002 2009

series ypolate

for !ss=1 to 4
	smpl s{!ss}
	series trend=@trend
	series temp = @recode(trend=@min(trend) or trend=@max(trend), y, na)
	temp.ipolate(f=na) temp2
	ypolate=temp2
next

smpl @all

Posted: **Tue Apr 13, 2010 10:12 am**

Thanks a lot. I didn't remember that @trend created the index.

Regards,

Javier

EViews.com

Interpolation of first/last point in sample

Interpolation of first/last point in sample

Re: Interpolation of first/last point in sample

Re: Interpolation of first/last point in sample