grafana/grafana — pull request #895 by ngmlabs (2014-10-03 23:42:59+00:00)
Title: second parameter of groupByNode() should be 0 indexed

Graphite docs state that the second parameter of groupByNode() is 0 indexed.

https://graphite.readthedocs.org/en/latest/functions.html#graphite.render.functions.groupByNode