[Gretl-users] how to delete observations and merge databases

Dear Gretl community, I have two questions. I have a panel dataset and I want to delete the first 31 observations of each unit. I have read that one possible way is to restrict the sample and then save it. I think this could not be possible. As a second way I write a loop in order each time delete the first 31 observations looping through units. But there is not delete command for observations, as the command drop in STATA. The second one is a little more tricky. I have one dataset as a panel, and another that has additional information of some of the variables, but just once. The two databases are of different length. Is there any way that gretl merge this two databases and repeat each value of ? I think the obvious answer is no. So I need to create an empty database and repeat each observation the number of times it appear in the panel, I am right? If anyone knows any workaround for this it will be very helpful. Regards, Leandro