open data9-9
list xlist = nocars pop Y price primert
#The following two lines pass the values
#of the tramodir and tramo executable path
#as defined by default in gretl preferences. 
#You can also change this using for example
#string tramodi = "/home/etpdihei/gretl/tramo"
#string tram = "/usr/bin/tramo"
sprintf tramodi "@tramodir"
sprintf tram "@tramo"
include tl-linwin.inp
scalar linux=1
loop foreach i xlist --quiet
 genr $i_a = tramolin($i, 1976, 1, linux)
endloop