Hello, thank you for the hints. The append command worked out quite well, at least if I have only one series to append, unfortunately, it doesn't work if I try to append more than one series simultaneously. Gretl stopps and tells me, that the data frequency does not match, though all new series are of equal length. As I do not have a lot of time series to append, I can import them one by one. Regards, Jan ________________________________________ Von: Plus.line MailSystem [cyrus(a)mailer.plusline.de] im Auftrag von Pindar [pindar777(a)gmail.com] Gesendet: Montag, 13. August 2012 20:54 An: Gretl list Betreff: Re: [Gretl-users] Import data as panel or change existing data set structure Am 13.08.2012 20:43, schrieb Jan Tille: Hello dear gretl users, I have a question regarding the structuring of data as panel-set. I want to create a panel that consists of 890 investment fund time series. I have no problem to stack them either cross-sectionally or as a stacked time-series. The problem I am trying to solve is that I also have a single time series that shall be used as common a regressor for all the individual units, i.e. I need this series in a panel setup. I know that I can prepare an excel sheet, where I either copy the time-series 890 times in a single column (stacked time-series) or where I copy each time observation 890 times (cross-section). As this is a pretty dull task I am looking for a command so that gretl performs this task upon the data import. Hi Jan, there are several ways: a) try the append command which has a special routine for panels b) try the new join command c) import the data as a matrix and use loop commands with the proper matrix selection like matrix[n,] so generate a new matrix that has the same structure as the series you need. then just transform the matrix into a series Hope you get along with his hints. I hope, that I have presented my problem properly to you. Many thanks in advance, Jan _______________________________________________ Gretl-users mailing list Gretl-users@lists.wfu.edu<mailto:Gretl-users@lists.wfu.edu> http://lists.wfu.edu/mailman/listinfo/gretl-users

On Tue, 14 Aug 2012, Sven Schreiber wrote: Yes, it should. So long as the length of the time series to be appended matches the time dimension of the panel. Here's a simple test case. <hansl> # create a couple of "time series" of length 20 nulldata 20 series x1 = index * 2 series x2 = index * 3 store x.csv x1 x2 # create a panel dataset, 5 units over 20 periods nulldata 100 setobs 20 1:1 --stacked-time-series genr unit genr time # append the two time series append x.csv print unit time x1 x2 -o </hansl> Allin Cottrell