Re: [Gretl-users] sorry, learning hansl question
You can do this in two ways.
First:
smpl 1855 1894
loop i = 1..3
#do stuff
smpl +5 +5
endloop
Second:
string st_yr = "1855 1860 1865 1870"
string ed_yr = "1894 1899 1904 1909"
string st ed
loop i = 1..4
st = strsplit(st_yr,i)
ed = strsplit(ed_yr,i)
smpl @st @ed
#do stuff
endloop
The second option should only be used if your periods do not change in a regular way as it
is slower.
Logan
-----Original Message-----
From: gretl-users-bounces(a)lists.wfu.edu [mailto:gr etl-users-
bounces(a)lists.wfu.edu] On Behalf Of Tim Nall
Sent: Friday, May 16, 2014 9:10 PM
To: Gretl list
Subject: [Gretl-users] sorry, learning hansl question
If you can figure out the iffy psuedo-psuedocode below, I'm trying to run 1 ols
regression over 4 different date ranges (so total 4
regressions) with 1 dependnet variable and 1 independant variable..
but I want to run a kpss test on both the depvar and indvar before doing the
regression for each date range, then utilize either the variable or its fiorst-
differenced version depending on the results of the kpss (at 5%, hopefully).
Can this be done in hansl?
start_yr = 1855 1860 1865 1870
end_yr = 1894 1899 1904 1909
## get MyDepVar and myIndVar from file, then
for i in start_yr, end_yr
smpl start_yr end_yr
kpss 3 myDepVar ## and capture results
if stationary = True:
tempDepVar = MyDepVar
else:
tempDepVar = d_MyDepvar
kpss 3 myIndVar ## and capture results
if stationary = True:
tempIndVar = myIndVar
else:
tempIndVar = d_myIndVar
ols tempDepVar tempIndVar
--
Best regards,
Timothy M. Nall
Assistant Professor
National Quemoy University
Kinmen, Taiwan
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