Package nltk :: Package classify :: Module weka :: Class ARFF_Formatter

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Class ARFF_Formatter

Converts featuresets and labeled featuresets to ARFF-formatted strings, appropriate for input into Weka.

Instance Methods

__init__(self, labels, features)

source code

format(self, tokens)

source code

labels(self)

source code

write(self, filename, tokens)

source code

header_section(self)

source code

data_section(self, tokens, labeled=None)

source code

_fmt_arff_val(self, fval)

source code

Static Methods

from_train(tokens)

source code

Method Details

init(self, labels, features)
(Constructor)

Parameters:

labels - A list of all labels that can be generated.
features - A list of feature specifications, where each feature specification is a tuple (fname, ftype); and ftype is an ARFF type string such as NUMERIC or STRING.

data_section(self, tokens, labeled=None)

Parameters:

labeled - Indicates whether the given tokens are labeled or not. If None, then the tokens will be assumed to be labeled if the first token's value is a tuple or list.