TimeSeries.PRG64

Computing pseudorandom 64-bit words. We use RC5 as a basis for our PRG.

Documentation

rnd

Arguments

:: Word64

bw, size of unit vector.

-> Word64

nb, size of control vector.

-> Integer

Seed.

-> ([Double], [Double])

(unit vector, control vector).

Random unit vector and control vector, with specified size.

Same random sequence will returned with same seed, so that sketch distance could be calculated with same random sequence.

data PRG64

Constructors

PRG64

Fields

prg64A :: !Word64

prg64B :: !Word64

Instances

Show PRG64

prg64Keys :: [(Word64, Word64)]

Key pairs for rounds a-la RC5. We have to have at lest 6 rounds for avalanche effect.

prg64Next :: PRG64 -> (PRG64, Word64)

Compute the next value.

prg64Init :: Integer -> PRG64

prg64Bits :: Num a => PRG64 -> [[a]]

generateRandomVectorsCSV :: Integer -> Int -> Int -> String