This follows up on the thread started by Artur at https://www.mail-archive.com/gretl-devel@gretlml.univpm.it/msg10198.html Since "foreach" loops are advertised as working via string substitution, it seems they really ought to work for arrays of strings, and that's now in git. Trivial example follows: <hansl> strings S = defarray("tea", "coffee", "schnapps") loop foreach i S -q print "Would you like $i?" endloop </hansl> It's not clear to me that it's desirable to extend this to arrays of other types, nor what that would actually involve in terms of the usability (or otherwise) of "$i". Here's one possible notion: <hansl status="notional"> matrices MM = defarray(I(3), mnormal(3,3)) loop foreach i MM -q eval $i[1,1] endloop </hansl> where we use string substitution to make "$i" come out as "MM[1]" then "MM[2]". Personally, I don't find this at all appealing. A second possible notion: <hansl status="notional"> matrices MM = defarray(I(3), mnormal(3,3)) loop foreach i MM -q eval MM[i][1,1] endloop </hansl> In this case we don't mess with supporting string substitution for arrays of matrices but just let "foreach i MM" stand as shorthand for "i=1..nelem(MM)", thereby saving 2 keystrokes. Meh. Allin