dataframe-1.0.0.1: A fast, safe, and intuitive DataFrame library.

Safe Haskell	None
Language	Haskell2010

DataFrame.Operations.Typing

Synopsis

type DateFormat = String
data ParseOptions = ParseOptions {
- missingValues :: [Text]
- sampleSize :: Int
- parseSafe :: Bool
- parseDateFormat :: DateFormat
}
defaultParseOptions :: ParseOptions
parseDefaults :: ParseOptions -> DataFrame -> DataFrame
parseDefault :: ParseOptions -> Column -> Column
parseFromExamples :: ParseOptions -> Vector Text -> Column
handleBoolAssumption :: Vector (Maybe Text) -> Column
handleIntAssumption :: Vector (Maybe Text) -> Column
handleDoubleAssumption :: Vector (Maybe Text) -> Column
handleDateAssumption :: DateFormat -> Vector (Maybe Text) -> Column
handleTextAssumption :: Vector (Maybe Text) -> Column
handleNoAssumption :: DateFormat -> Vector (Maybe Text) -> Column
convertNullish :: [Text] -> Text -> Maybe Text
convertOnlyEmpty :: Text -> Maybe Text
parseTimeOpt :: DateFormat -> Text -> Maybe Day
unsafeParseTime :: DateFormat -> Text -> Day
hasNullValues :: Eq a => Vector (Maybe a) -> Bool
vecSameConstructor :: Vector (Maybe a) -> Vector (Maybe b) -> Bool
makeParsingAssumption :: DateFormat -> Vector (Maybe Text) -> ParsingAssumption
data ParsingAssumption
- = BoolAssumption
- | IntAssumption
- | DoubleAssumption
- | DateAssumption
- | NoAssumption
- | TextAssumption
parseWithTypes :: Bool -> Map Text SchemaType -> DataFrame -> DataFrame
readAsMaybe :: Read a => String -> Maybe a
readAsEither :: Read a => String -> a

Documentation

type DateFormat = String Source #

data ParseOptions Source #

Options controlling how text columns are parsed into typed values.

Constructors

Fields

missingValues :: [Text]
Values to treat as Nothing when parseSafe is True.
sampleSize :: Int
Number of rows to inspect when inferring a column's type (0 = all rows).
parseSafe :: Bool
When True, treat missingValues and nullish strings as Nothing. When False, only empty strings become Nothing.
parseDateFormat :: DateFormat
Date format string as accepted by Data.Time.Format (e.g. "%Y-%m-%d").

defaultParseOptions :: ParseOptions Source #

Sensible out-of-the-box parse options: infer from the first 100 rows, treat common nullish strings as missing, and expect ISO 8601 dates.

parseDefaults :: ParseOptions -> DataFrame -> DataFrame Source #

parseDefault :: ParseOptions -> Column -> Column Source #

parseFromExamples :: ParseOptions -> Vector Text -> Column Source #

handleBoolAssumption :: Vector (Maybe Text) -> Column Source #

handleIntAssumption :: Vector (Maybe Text) -> Column Source #

handleDoubleAssumption :: Vector (Maybe Text) -> Column Source #

handleDateAssumption :: DateFormat -> Vector (Maybe Text) -> Column Source #

handleTextAssumption :: Vector (Maybe Text) -> Column Source #

handleNoAssumption :: DateFormat -> Vector (Maybe Text) -> Column Source #

convertNullish :: [Text] -> Text -> Maybe Text Source #

convertOnlyEmpty :: Text -> Maybe Text Source #

parseTimeOpt :: DateFormat -> Text -> Maybe Day Source #

unsafeParseTime :: DateFormat -> Text -> Day Source #

hasNullValues :: Eq a => Vector (Maybe a) -> Bool Source #

vecSameConstructor :: Vector (Maybe a) -> Vector (Maybe b) -> Bool Source #

makeParsingAssumption :: DateFormat -> Vector (Maybe Text) -> ParsingAssumption Source #

data ParsingAssumption Source #

Constructors

BoolAssumption
IntAssumption
DoubleAssumption
DateAssumption
NoAssumption
TextAssumption

parseWithTypes :: Bool -> Map Text SchemaType -> DataFrame -> DataFrame Source #

readAsMaybe :: Read a => String -> Maybe a Source #

readAsEither :: Read a => String -> a Source #