Re: [Gretl-users] inlist()-problem

On Fri, 19 Apr 2013, artur tarassow wrote: > I've got another problem, > > I am trying check whether the variable "time" is present in list L1. This > correct position is shown in the first example below. But if I add this > inlist-command to a function environment, the scalar check2 = 0 but should > be 2. I am using gretl (built: 2013-03-17) on Windows. > > <hansl> > set messages off > set echo off > open denmark --quiet > > #Works > ols LRM const time diff(LRM) > L1 = $xlist > scalar check1 = inlist(L1,const) > check1 > scalar check2 = inlist(L1,time) > check2 > > #Within a function check2 gives the wrong result > ols LRM const time diff(LRM) > L1 = $xlist > function void Ltest (list L) > scalar check1 = inlist(L,const) > print check1 > scalar check2 = inlist(L,time) > print check2 > end function > Ltest(L1) > </hansl> This is rather confusing, admittedly, but it's not exactly a bug. The point is that series supplied to a function via a list argument are in a different namespace from series defined within the function. This would be more apparent if you tried scalar check = inlist(L, d_LRM) inside your function: you'd get an error, because the series d_LRM is not "visible" as such within the function. I'll think about this issue some more (and how best to resolve and/or document it). But in the meantime you can do the test you want by iterating over the list, as in <hansl> function void Ltest (list L) loop foreach i L if "$i" == "time" printf "time: list position = %d\n", i endif endloop end function </hansl> Allin _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users