Dear all,

I have two quick problems:

1) I have a database which have monthly data. I want to compact the data restricting the original database.

In doing so, I have made the following loop:

loop i=2002..2012 --progressive
    loop j=1..12 --progressive
        smpl Destino=1 && Familia=2 && Anio=i && Mes=j --restrict
        M[132+(i-2002)*12+j,2]=nobs(Anio)
        smpl full
    endloop
endloop

which store each sample in a matrix.

The problem is that sometimes the result from the restriction is null. In that case, the loop breaks and stop running. I know that I have to use the if command, but I do not how.

What I want to do is that if the result of the restriction is null, then to store a N/A, and continue the loop.

2) The second point I want to know is if there is a chance to put "labels", strings should be the right word, in the first row of the matrix.

Thanks,

Leandro