def load_test_data(filename, subreddits):
instances = []
# each Subreddit's index in the FeatureVector is it's position in subreddits[]
# iterate through file again
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
split_line = line.split(",")
label = ClassificationLabel(split_line[0])
split_line.pop(0)
feature_vector = FeatureVector()
for subreddit in split_line:
# sometimes there is an extraneous "\n"
if "\n" in subreddit:
subreddit = subreddit.replace("\n", "")
if subreddit in subreddits:
feature = subreddits.index(subreddit)
feature_vector.add(feature, 1)
instance = Instance(feature_vector, label)
instances.append(instance)
return instances
def predict(self, instance):
max_k, max_val = -1, -float('inf')
for k in range(1, max(self.all_labels) + 1):
val = self.compute_dot_product(
instance._feature_vector.feature_vector, k)
if val > max_val:
max_k, max_val = k, val
elif val == max_val and k < max_k:
max_k = k
return ClassificationLabel(max_k)
def load_data(filename):
instances = []
global indexmax
indexmax = 1
with open(filename) as reader:
for line in reader:
split_line = line.split(" ")
for item in split_line[1:]:
index = int(item.split(":")[0])
if index > indexmax:
indexmax = index
indexmax = indexmax + 1
if pastindexmax != -1:
indexmax = pastindexmax
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
split_line = line.split(" ")
label_string = split_line[0]
int_label = -1
try:
int_label = int(label_string)
except ValueError:
raise ValueError("Unable to convert " + label_string +
" to integer.")
label = ClassificationLabel(int_label)
feature_vector = FeatureVector(indexmax)
for item in split_line[1:]:
try:
index = int(item.split(":")[0])
except ValueError:
raise ValueError("Unable to convert index " +
item.split(":")[0] + " to integer.")
try:
value = float(item.split(":")[1])
except ValueError:
raise ValueError("Unable to convert value " +
item.split(":")[1] + " to float.")
if value != 0.0:
if index <= indexmax:
feature_vector.add(index, value)
instance = Instance(feature_vector, label)
instances.append(instance)
return instances
def load_data(filename):
"""Function for loading the features from a file into instances"""
instances = []
with open(filename) as reader:
# print('adding to the instances')
global max_size
max_size = 0
global max_max_index
max_max_index = 0
for line in reader:
if len(line.strip()) == 0:
continue
# Divide the line into features and label.
split_line = line.split(" ")
label_string = split_line[0]
int_label = -1
try:
int_label = int(label_string)
except ValueError:
raise ValueError("Unable to convert " + label_string +
" to integer.")
label = ClassificationLabel(int_label)
feature_vector = FeatureVector()
for item in split_line[1:]:
try:
index = int(item.split(":")[0])
except ValueError:
raise ValueError("Unable to convert index " +
item.split(":")[0] + " to integer.")
try:
value = float(item.split(":")[1])
except ValueError:
raise ValueError("Unable to convert value " +
item.split(":")[1] + " to float.")
if value != 0.0:
feature_vector.add(index, value)
instance = Instance(feature_vector, label)
instances.append(instance)
# if feature_vector._size > max_size:
# max_size = feature_vector._size
if feature_vector._max_index > max_max_index:
max_max_index = feature_vector._max_index
# print('finished adding')
return instances
def load_instances(self):
filename = "output/word_frequencies.txt"
with open(filename) as reader:
for line in reader:
split_line = line.split(" ")
label = ClassificationLabel(split_line[0])
split_line.pop(0)
fv = FeatureVector()
for word in split_line:
if word != "\n":
num = word.split(":")
fv.add(int(num[0]), int(num[1]))
instance = Instance(fv, label)
self.instances.append(instance)
return self.instances
def load_more_data(filename):
subreddits = []
instances = []
# figure out what all the possible Subreddits are
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
split_line = line.split(",")
split_line.pop(0)
for subreddit in split_line:
# sometimes there is an extraneous "\n"
if "\n" in subreddit:
subreddit = subreddit.replace("\n", "")
if subreddit not in subreddits:
subreddits.append(subreddit)
# each Subreddit's index in the FeatureVector is it's position in self.subreddits[]
# iterate through file again
counter = 0
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
split_line = line.split(",")
label = ClassificationLabel(split_line[0])
split_line.pop(0)
feature_vector = FeatureVector()
for subreddit in split_line:
# sometimes there is an extraneous "\n"
if "\n" in subreddit:
subreddit = subreddit.replace("\n", "")
feature = subreddits.index(subreddit)
feature_vector.add(feature, 1)
instance = Instance(feature_vector, label)
instances.append(instance)
counter += 1
#if counter % 100 == 0:
#print(counter)
return (instances, subreddits)
def load_data(filename):
instances = []
#added
highest_idx = 0
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
# Divide the line into features and label.
split_line = line.split(" ")
label_string = split_line[0]
int_label = -1
try:
int_label = int(label_string)
except ValueError:
raise ValueError("Unable to convert " + label_string +
" to integer.")
label = ClassificationLabel(int_label)
feature_vector = FeatureVector()
for item in split_line[1:]:
try:
index = int(item.split(":")[0])
#added
if (index > highest_idx): highest_idx = index
except ValueError:
raise ValueError("Unable to convert index " +
item.split(":")[0] + " to integer.")
try:
value = float(item.split(":")[1])
except ValueError:
raise ValueError("Unable to convert value " +
item.split(":")[1] + " to float.")
if value != 0.0:
feature_vector.add(index, value)
instance = Instance(feature_vector, label)
instances.append(instance)
#added
return instances, highest_idx
def create_instances(self):
counter = 0.0
length = len(self.descriptions)
filename = "output/word_frequencies.txt"
fo = open(filename, "wb")
for d in self.descriptions:
stripped = self.clean_text(d['description'])
label = ClassificationLabel(int(counter))
fv = FeatureVector()
for word in stripped:
feature = self.corpus.index(word)
fv.add(feature, int(fv.get(feature) + 1))
instance = Instance(fv, label)
self.instances.append(instance)
line = str(label) + " "
for f in fv.get_keys():
line += str(f) + ":" + str(fv.get(f)) + " "
fo.write(line.encode('utf8') + "\n")
counter += 1
self.update_progress(float(counter / length))
fo.close()
def load_data(filename):
"""Function for loading the features from a file into instances"""
count = 0 #
count2 = 0 # REMOVE
instances = []
with open(filename) as reader:
for line in reader:
if len(line.strip()) == 0:
continue
# Divide the line into features and label.
split_line = line.split(" ")
label_string = split_line[0]
int_label = -1
try:
int_label = int(label_string)
except ValueError:
raise ValueError("Unable to convert " + label_string + " to integer.")
label = ClassificationLabel(int_label)
feature_vector = FeatureVector()
# while (counter < 10): # REMOVE
# print("%s" % str(label)) # REMOVE
# counter += 1
for item in split_line[1:]:
try:
index = int(item.split(":")[0])
except ValueError:
raise ValueError("Unable to convert index " + item.split(":")[0] + " to integer.")
try:
value = float(item.split(":")[1])
except ValueError:
raise ValueError("Unable to convert value " + item.split(":")[1] + " to float.")
if value != 0.0:
# if (count2 < 10): # REMOVE
# print("index = %f" % index) # REMOVE
# print("value = %f" % value)
# count2 += 1
feature_vector.add(index, value)
# print("num non zero = %d", feature_vector.get_lil_matrix().count_nonzero())
instance = Instance(feature_vector, label)
instances.append(instance)
# print('label = %d' % label._class)
#REMOVE
fv2 = coo_matrix(instances[1].get_feature_vector().get_lil_matrix())
# print("row = %d" % fv2.row)
# print("col = %d" % fv2.col)
# for i, j, v in zip(fv2.row, fv2.col, fv2.data):
# if (count < 10):
# print ("shit = (%d, %d), %s" % (i,j,v))
# count += 1
# print("num non zero = %d" % fv2.count_nonzero())
return instances
def predict(self, instance):
return ClassificationLabel(
self.sign(instance._feature_vector.feature_vector))
def predict(self, instance):
return ClassificationLabel(1) if self.compute_dot_product(
instance) >= 0 else ClassificationLabel(0)
