[Gretl-users] Re: appending (or joining) a plain time series into a panel

join annual.gdt x --data=index --ikey=year --okey=$obsmajor print -o </hansl> This wasn't working in the GUI because it wasn't set up to handle native gretl datafiles -- glad we caught that problem! As things stood you'd have to know to type "$obsmajor" for the outer key. But that's now represented in the GUI and the help text is updated to explain that you can't import $obsmajor but can use it as a key.