Thank you very much, Leon and Allin. GRTL runs perfectly well my analyses. Kind regards Luisma Luis M. Carrascal http://www.lmcarrascal.eu/ email: lmcarrascal(a)mncn.csic.es Dept. Biogeografía y Cambio Global MNCN-Consejo Superior de Investigaciones Científicas C/ Pinar 25, 3ª planta. 28006 Madrid. SPAIN Tfno: 34 91 5668963, Fax: 91 5645078 De: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] En nombre de Pindar Enviado el: 19 de junio de 2013 19:49 Para: Gretl list Asunto: Re: [Gretl-users] sampling by restriction on a $i variable within a loop Hi, here is sample script that should help u further. As a general point the $i is used for strings/stringsubstitution. In ur code u are referring to numbers. What u need to do is first is defining a list with these numbers and then use the $i, but have a look: <hansl> open abdata.gdt set echo off set messages off list xList = seq(3,5) matrix alphas = zeros(nelem(xList),1) loop foreach i xList --quiet smpl $i>0 --restrict ols $i lags(1,$i) --quiet alphas[i] = $coeff endloop eval mean(alphas) eval sd(alphas) # compared to the --progressive switch loop foreach i xList --progressive smpl $i>0 --restrict ols $i lags(1,$i) endloop <hansl> Cheers Leon 18.06.2013 19:57, Luis M. Carrascal: Dear GRTL users, Probably it is a stupid question, but … how can I restrict data analyses within a loop affecting several response variables $i, when the restriction affects each variable $i? the line “smpl $i > 0 --restrict” does not work within this loop (from response variable 39 to response variable 145): loop i=39..145 --progressive smpl $i > 0 --restrict quantreg {.95} $i const TMINstd TMINstd2 PRECmedINVstd PRECINVstd2 --robust … more commands … endloop PD: I have a very large sample size (n=1690) Thanks you very much in advance Luis M. Carrascal http://www.lmcarrascal.eu/ email: lmcarrascal(a)mncn.csic.es Dept. Biogeografía y Cambio Global MNCN-Consejo Superior de Investigaciones Científicas C/ Pinar 25, 3ª planta. 28006 Madrid. SPAIN Tfno: 34 91 5668963, Fax: 91 5645078 _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users