Comment 5 for bug 961374

Sandy - removeAboveValue is what Chris intended to write I think, but unfortunately it wont work in this case as the way it removes values is setting them to None which will still leave your JSON output polluted with Nones.

There's a lot of logic in Graphite that depends on the the data having even steps between data points so implementing this with a function wont work. It could instead be added as another format (sparseJson?) or as an option applicable to the json and csv formats.

If you'd like to see this, file a bug so that we can keep track of the feature request