Data.Metrics.Snapshot

Documentation

newtype Snapshot

A wrapper around a *sorted* vector intended for calculating quantile statistics.

Constructors

Snapshot

Fields

• fromSnapshot :: Vector Double

  A sorted Vector of samples.

Instances

Show Snapshot

Methods

showsPrec :: Int -> Snapshot -> ShowS

show :: Snapshot -> String

showList :: [Snapshot] -> ShowS

quantile :: Double -> Snapshot -> Double

Calculate an arbitrary quantile value for a Snapshot. Values below zero or greater than one will be clamped to the range [0, 1]. Returns 0 if no values are in the snapshot

size :: Snapshot -> Int

Get the number of elements in a Snapshot

median :: Snapshot -> Double

Calculate the median value of a Snapshot

get75thPercentile :: Snapshot -> Double

Calculate the 75th percentile of a Snapshot

get95thPercentile :: Snapshot -> Double

Calculate the 95th percentile of a Snapshot

get98thPercentile :: Snapshot -> Double

Calculate the 98th percentile of a Snapshot

get99thPercentile :: Snapshot -> Double

Calculate the 99th percentile of a Snapshot

get999thPercentile :: Snapshot -> Double

Calculate the 99.9th percentile of a Snapshot

takeSnapshot :: PrimMonad m => MVector (PrimState m) Double -> m Snapshot

A utility function for snapshotting data from an unsorted MVector of samples.

NB: this function uses "unsafeFreeze" under the hood, so be sure that the vector being snapshotted is not used after calling this function.