Re: [Gretl-users] odd behavior of "diff"

Hi Sven, Thanks, this provides more information! I modified my example script following your suggestions -- see below. > > [This is probably OT, sorry] > Doesn't look that way... > Am 19.05.2016 um 19:06 schrieb Summers, Peter: >> >> list ylist = y1 y2 >> loop foreach i ylist --quiet >> r = 100*diff(log(ylist[i])) > > I find it strange to combine the 'foreach' loop with the numerical indexing > into the list. I would have expected either the following: > > loop i=1..nelem(ylist) > ... ylist[i] > This version gives the "odd" results in my first message. > or this variant: > > loop foreach i ylist > ... $i > This variant gives the results I expected -- missing values where they should be. Looks like the problem is at least partly down to my poor hansl technique!