Hello Marc, You can group by edge, and then sum:
edges .groupBy(0,1) // make first two fields a composite key .sum(2); // sum the value field This will turn multiple edges that have the same source and target into one edge, whose value will be the sum of the values of the original group of edges. Best, Gabor PS.: Sorry for the duplicate email, I accidentally sent my previous email only to you instead of the mailing list. On Mon, Apr 17, 2017 at 5:46 PM, Kaepke, Marc <[email protected]> wrote: > Hi, > > how can I sum and reduce multiple edges in my entire graph? > > e.g. my input graph looks like (source-ID, target-ID, value): > (1, 2, 30) > (1, 2, 10) > (2, 1, 55) > > And I need: > (1, 2, 40) > (2, 1, 55) > > > Thanks! > Marc
