The platform default is 'plateau', so the order a sweep answers with is
not raw objective order unless you ask for it. A plateau score is the
objective of the worst run in a point's immediate neighbourhood, so a point
only ranks well when the region around it does too — which exists because
the highest raw score is very often a spike that does not survive the
parameters moving slightly.
What you request is not always what you get. Read ranking on the
result to find out which ordering was actually applied: a sweep with no
stored parameter grid has no neighbourhood to score against and falls back
to 'raw', and a walk-forward sweep is always 'raw' because its
leaderboard is one out-of-sample row per fold rather than a grid.
This applies to the ranked view only. Alongside order: 'natural' it is
ignored — that view is always ordered by runIx.
How the ranked leaderboard is ordered.
The platform default is
'plateau', so the order a sweep answers with is not raw objective order unless you ask for it. A plateau score is the objective of the worst run in a point's immediate neighbourhood, so a point only ranks well when the region around it does too — which exists because the highest raw score is very often a spike that does not survive the parameters moving slightly.What you request is not always what you get. Read
rankingon the result to find out which ordering was actually applied: a sweep with no stored parameter grid has no neighbourhood to score against and falls back to'raw', and a walk-forward sweep is always'raw'because its leaderboard is one out-of-sample row per fold rather than a grid.This applies to the ranked view only. Alongside
order: 'natural'it is ignored — that view is always ordered byrunIx.