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Create a custom implementation of standard deviation #65

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Merged
mchav merged 4 commits into from
Aug 22, 2025
Merged

Create a custom implementation of standard deviation #65

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e4b3bc2
feat: Remove unused imports.
metapho-re Aug 22, 2025
926f633
feat: Create custom version of standard variation.
metapho-re Aug 22, 2025
c9f97d7
feat: Rewrite standard variation implementation using existing variance.
metapho-re Aug 22, 2025
a602271
chore: Remove unused standard variation implementation.
metapho-re Aug 22, 2025
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2 changes: 0 additions & 2 deletions src/DataFrame/Operations/Aggregation.hs
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Expand Up @@ -20,8 +20,6 @@ import qualified Data.Vector.Algorithms.Merge as VA
import qualified Data.Vector.Generic as VG
import qualified Data.Vector.Mutable as VM
import qualified Data.Vector.Unboxed as VU
import qualified Statistics.Quantile as SS
import qualified Statistics.Sample as SS

import Control.Exception (throw)
import Control.Monad (foldM_)
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2 changes: 1 addition & 1 deletion src/DataFrame/Operations/Statistics.hs
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Expand Up @@ -62,7 +62,7 @@ median :: T.Text -> DataFrame -> Maybe Double
median = applyStatistic median'

standardDeviation :: T.Text -> DataFrame -> Maybe Double
standardDeviation = applyStatistic SS.fastStdDev
standardDeviation = applyStatistic (sqrt . variance')

skewness :: T.Text -> DataFrame -> Maybe Double
skewness = applyStatistic SS.skewness
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