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What's the most efficient way to step through each data point within an unknown smpl of unknown frequency? For example: a loop that runs for each day of a D5 freq file over a 3 month smpl, or a loop that steps through each month of a monthly freq file over a two year smpl. The freq and smpl will be changing. Will a FOR loop recognize dates? I've tried several variations but can't get it to work. ! loops are integer-only and % loops work off lists?

Thanks.

The frequency part depends on the workpage, so in terms of the for loop, it's just add 1 (or if you use @dateadd, that would require a bit of work on the @pagefreq front). As to the duration of the smpl (3 months vs 2 years), could you find out from either the @pagesmpl or @smpl function in equation (if you are running one)?

Further to what has already been said, remember that you can use offsets in smpl commands too, so that you can do: which will be the 11th through 16th observations, no matter what the frequency of the page is.

Also, you can use the @otod function to convert from observation number to dates.