Sha256: bd5d8e09653526005d20e01f10182b3d29268fda913fb40e341de4db8a4dbb7e
Contents?: true
Size: 1.7 KB
Versions: 7
Compression:
Stored size: 1.7 KB
Contents
module Stamina
#
# Provides a reusable module for binary classifiers. Classes including this
# module are required to provide a label_of(string) method, returning '1' for
# strings considered positive, and '0' fr strings considered negative.
#
# Note that an Automaton being a classifier it already includes this module.
#
module Classifier
#
# Computes a signature for a given sample (that is, an ordered set of strings).
# The signature is a string containing 1 (considered positive, or accepted)
# and 0 (considered negative, or rejected), one for each string.
#
def signature(sample)
signature = ''
sample.each do |str|
signature << label_of(str)
end
signature
end
alias :classification_signature :signature
#
# Classifies a sample then compute the classification scoring that is obtained
# by comparing the signature obtained by classification and the one of the sample
# itself. Returns an object responding to methods defined in Scoring module.
#
# This method is actually a convenient shortcut for:
#
# Stamina::Scoring.scoring(signature(sample), sample.signature)
#
def scoring(sample)
Stamina::Scoring.scoring(signature(sample), sample.signature)
end
alias :classification_scoring :scoring
#
# Checks if a labeled sample is correctly classified by the classifier.
#
def correctly_classify?(sample)
sample.each do |str|
label = label_of(str)
expected = (str.positive? ? '1' : '0')
return false unless expected==label
end
true
end
end # module Classifier
class Automaton
include Stamina::Classifier
end
end # module Stamina
Version data entries
7 entries across 7 versions & 1 rubygems