Text.ARFF

Documentation

data AttributeType

Constructors

Numeric

Nominal [ByteString]

String

Instances

Show AttributeType

data Attribute

Constructors

Attribute

Fields

name :: ByteString

dataType :: AttributeType

Instances

Show Attribute

data Header

Represents the entire header

Constructors

Header

Fields

title :: ByteString

Name of the relation (@RELATION foo)

attributes :: [Attribute]

Mapping of indexes to values

Instances

Show Header

data AttributeValue

Value of a single attribute in a single row

Constructors

NumericValue Double

NominalValue ByteString

StringValue ByteString

Instances

Show AttributeValue

showAttributeValue :: AttributeValue -> String

before :: Parser p1 -> Parser p2 -> Parser p1

Parse two expressions sequentially, returning the result of the first.

isInlineSpace :: Char -> Bool

matches non-newline space characters

lineSpace :: Parser ()

Parses a sequence of non-newline space characters

comment :: Parser ()

lineEnd :: Parser ()

Matches what should be the end of the line- optional comment then newline.

identifier :: Parser ByteString

identifier parses arguments to \@ directives, e.g. @RELATION foo TODO: Check these rules against the spec! TODO: Allow quoted identifiers with spaces inside.

relation :: Parser ByteString

Parse the title of the relation

attributeType :: Parser AttributeType

Parse the attribute type: @ATTRIBUTE name type

attribute :: Parser Attribute

Parse an attribute: @ATTRIBUTE Name Type

line :: Parser p -> Parser p

Parses the next expected line

header :: Parser Header

Parse an ARFF header.

value' :: AttributeType -> Parser AttributeValue

Parse a value of the expected type (not handling missings)

value :: AttributeType -> Parser (Maybe AttributeValue)

Parse a value of the expected type, returning Nothing for missing values

row :: [AttributeType] -> Parser [Maybe AttributeValue]

Create a parser which parses a single row of AttributeValues, expecting each to be in order of the Attributes supplied.

rows :: Header -> Parser [[Maybe AttributeValue]]

Parse all data rows in the file.

arff :: Parser (Header, [[Maybe AttributeValue]])

Parse a tuple of Header data and a list of rows, composed of values or Nothing (for missing- ?- values).