Am 24.11.2015 um 15:27 schrieb Alessandro Astuti: Not directly as a function with its own name (I think), but it's fairly easy to get the effect. If x is your series, and you want to consider values above 10 only, then you can do something like: scalar mysum = sum( (x > 10) * x) (If x is not a series but a matrix/vector, you probably would have to replace the "*" operator with ".*".) Background: "(x>10)" produces a series with 1 at those observations where the condition is true, and 0 else. If you want to avoid the multiplication for some reason, you could do it in two lines: series x2 = (x > 10) ? x : 0 scalar mysum2 = sum(x2) which copies zeros to x2 wherever x is not greater than 10. And of course you could wrap this into your own user-defined function sumif if you really need to. hth, sven