[Gretl-users] Dealing with NAs in Lists

Dear All, I'm trying to use the functions sd(x), and mean(x) in a list instead of a series. From what I understood, these functions ignore NAs when used in a series, but when used in a list they return NA if any missing value. I need to compute the cross-sectional mean and standard deviation and I want NAs to be ignored, as they are in a series. Is there a simple way of doing this? Basically a I have a list with 10 series and I want to compute the standard deviations of all first observations, the standard deviation of all second observations and so on. In R there is a way of skipping NAs. Is there anything in Gretl? Thanks in advance Filipe