[Gretl-users] Import data as panel or change existing data set structure

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. I hope, that I have presented my problem properly to you. Many thanks in advance, Jan