[Gretl-users] Assign NA to first observation of a series

Hello, I have a matrix that I need to store as a series, but while the sample is t observation the matrix has only t-1 rows, i.e. the first observation is missing. The following works, but I am not sure this is the correct thing to do: Series MySeries = NA|MyMatrix While this works, it triggers the following warning: Warning: generated non-finite values What is the correct way to deal with a missing observation? I would rather not insert a zero. Thanks, Logan