def getFreAndWeight(self):
try:
doc = self.documentEdit.text()
term = self.termEdit.text()
freq = inverted_index.frequence(term, doc + ".txt")
weight = inverted_index.weight(term, doc + ".txt")
self.freqLabel.setText('Frequence ' + str(freq))
self.weightLabel.setText('Weight %.2f' % weight)
except FileNotFoundError:
self.popup("No document found",
"There is no document in the collectin with that name",
"No document Found")
def cosinus_measure(query, doc_name):
"""
Return Cosinus measure between a document and a query
:param query:The query string
:type: str
:param doc_name: the document name
:type: str
:return: inner product
:type: float
"""
x_values = [1 for term in query]
y_values = [
pow(inverted_index.weight(term, doc_name), 2) for term in query
]
x_sum = sum(x_values)
y_sum = sum(y_values)
measure = inner_product(query, doc_name) / math.sqrt(x_sum * y_sum)
return measure
def inner_product(query, doc_name):
"""
Return the inner product between a document and a query
:param query:The query string
:type: str
:param doc_name: the document name
:type: str
:return: inner product
:type: float
"""
sum_ = 0
for term in query:
x = 1
y = inverted_index.weight(term, doc_name)
sum_ += x * y
return sum_
def dice_coefficient(query, doc_name):
"""
Return Dice coefficient between a document and a query
:param query:The query string
:type: str
:param doc_name: the document name
:type: str
:return: inner product
:type: float
"""
x_values = [1 for term in query]
y_values = [
pow(inverted_index.weight(term, doc_name), 2) for term in query
]
x_sum = sum(x_values)
y_sum = sum(y_values)
coeff = (2 * inner_product(query, doc_name)) / x_sum + y_sum
return coeff
def jackard_measure(query, doc_name):
"""
Return jackard measure between a document and a query
:param query:The query string
:type: str
:param doc_name: the document name
:type: str
:return: inner product
:type: float
"""
x_values = [1 for term in query]
y_values = [
pow(inverted_index.weight(term, doc_name), 2) for term in query
]
x_sum = sum(x_values)
y_sum = sum(y_values)
measure = inner_product(
query, doc_name) / (x_sum + y_sum - inner_product(query, doc_name))
return measure