Hi all,

I'm trying to delete several series with a loop like this:

<gretl>

loop i=1 ..100

    if sum(ok(series$i)) < 20

        delete series$i

    endif

endloop

</gretl>

Let's say I have  series1, series2, ...,series100. I want to delete all series with less than 20 observations. But, Gretl doesn't allow this kind of massive deletion. Any ideas on how can I check over several series and delete those whic don't fit the criteria?

Many thanks in advance