Re: [Gretl-users] foreach vs for with list

-----Ursprüngliche Nachricht----- Von: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users- bounces(a)lists.wfu.edu] Im Auftrag von Allin Cottrell Gesendet: Freitag, 15. Dezember 2017 20:40 An: Gretl list <gretl-users(a)lists.wfu.edu&gt; Betreff: Re: [Gretl-users] foreach vs for with list On Fri, 15 Dec 2017, Allin Cottrell wrote: > On Fri, 15 Dec 2017, Schaff, Frederik wrote: > >> Hi there, I'd expect both options to be equivalent (add a matrix with >> the data from the series to the array of matrices). However, the >> forach loop only adds the first data-point to the matrix. >> >> <hansl> >> open denmark.gdt -q >> list ls = 1 4 >> matrices M = null >> loop foreach l ls >> matrix temp = l >> colnames(temp,varname(l)) >> M+=temp >> endloop >> >> matrices M2 = null >> loop s=1..nelem(ls) >> matrix temp = ls[s] >> colnames(temp,varname(ls[s])) >> M2 += temp >> endloop > > In your first loop, 'l' is a just scalar index, so > > matrix temp = l > > gives you {1} on the first iteration and {2} on the second. If you > want to access the series at position l in the list you need to say > > matrix temp = $l > > Then you'll get the same output as from your second loop. P.S. the varname() call in your first loop also needs fixing: on the second iteration l = 2 but presumably you want the name of the second series in the list, namely series 4, so: colnames(temp,varname(ls[l])) Allin _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users