Re: [Gretl-devel] The mysterious stack() function

One other thought: IMO the most desirable replacement for the existing stack() should probably also be able to handle (I suppose, via some option) the (simpler) case where we have a dataset with one or more blocks of N time-series of length T, where time goes vertically but the individuals are arrayed horizontally, in separate series, and we'd like to stack the N series into one panel series. For example, we open a CSV file which has N columns holding GDP 1990-2017 for N countries, and we want to panelize GDP. This may be a "join" task; I haven't thought it through yet, but I suspect that even if its doable via join there may be an advantage in automating it via some pstack() variant.