-- | -- Module : Statistics.Types -- Copyright : (c) 2009 Bryan O'Sullivan -- License : BSD3 -- -- Maintainer : bos@serpentine.com -- Stability : experimental -- Portability : portable -- -- Types for working with statistics. module Statistics.Types ( Estimator(..) , Sample , WeightedSample , Weights ) where import qualified Data.Vector.Unboxed as U (Vector) -- | Sample data. type Sample = U.Vector Double -- | Sample with weights. First element of sample is data, second is weight type WeightedSample = U.Vector (Double,Double) -- | An estimator of a property of a sample, such as its 'mean'. -- -- The use of an algebraic data type here allows functions such as -- 'jackknife' and 'bootstrapBCA' to use more efficient algorithms -- when possible. data Estimator = Mean | Variance | VarianceUnbiased | StdDev | Function (Sample -> Double) -- | Weights for affecting the importance of elements of a sample. type Weights = U.Vector Double