Data.Histogram.ST

Mutable histograms.

Mutable histograms

data HistogramST s bin a where

Mutable histogram.

Constructors

HistogramST :: (Bin bin, UA a) => bin -> MUArr a s -> MUArr a s -> HistogramST s bin a

newHistogramST :: (Bin bin, UA a) => a -> bin -> ST s (HistogramST s bin a)

Create new mutable histogram. All bins are set to zero element as passed to function.

fillOne :: Num a => HistogramST s bin a -> BinValue bin -> ST s ()

Put one value into histogram

fillOneW :: Num a => HistogramST s bin a -> (BinValue bin, a) -> ST s ()

Put one value into histogram with weight

fillMonoid :: Monoid a => HistogramST s bin a -> (BinValue bin, a) -> ST s ()

Put one monoidal element

freezeHist :: HistogramST s bin a -> ST s (Histogram bin a)

Create immutable histogram from mutable one. This operation involve copying.

Accumulators

class Accumulator h where

This is class with accumulation semantics. It's used to fill many histogram at once. It accept values of type a and return data of type b.

Methods

putOne :: h s a b -> a -> ST s ()

Put one element into accumulator

extract :: Monoid b => h s a b -> ST s b

Extract data from historam

Instances

Accumulator AccumHist

Accumulator AccumList

Accumulator Accum

data Accum s a b where

Abstract wrapper for histograms.

Constructors

Accum :: Accumulator h => h s a b -> Accum s a b

Instances

Accumulator Accum

accumList :: [ST s (Accum s a b)] -> ST s (Accum s a b)

Wrap list of histograms into one Accum

accumHist :: Bin bin => (a -> HistogramST s bin val -> ST s ()) -> (Histogram bin val -> b) -> HistogramST s bin val -> ST s (Accum s a b)

Accumulator for arbitrary HistogramST based histogram

fillHistograms :: Monoid b => (forall s. ST s (Accum s a b)) -> [a] -> b

Put all values into histogram and return result