def get_words_bigrams_frequency(docs, path):
fdist = FreqDist()
for doc in docs:
for word in doc:
fdist[word] += 1
for word in fdist.most_common():
append_row_to_text_file((word[0] + ": " + str(word[1])), path)
def get_words_frequency(data, path):
fdist = FreqDist()
for text in data.Submission_Text:
for word in word_tokenize(text):
fdist[word] += 1
for word in fdist.most_common():
append_row_to_text_file((word[0] + ": " + str(word[1])), path)
return fdist
def get_words_frequency2(dtm, path):
word_counts = {}
for word in dtm.columns.tolist():
total = dtm[word].sum()
word_counts.update({word: total})
sorted_dict = {k: v for k, v in sorted(word_counts.items(), key=lambda item: item[1], reverse=True)}
for k, v in sorted_dict.items():
append_row_to_text_file(str(k + ": " + str(v)), path)
# print(k + ": " + str(v))
return word_counts
def get_top_10_words_each_comment(tdm, path):
top_10_words = {}
for word in tdm.columns:
top = tdm[word].sort_values(ascending=False).head(10)
top_10_words[word] = list(zip(top.index, top.values))
rs = str(
word + ':\n'
+ str(top_10_words[word])
)
append_row_to_text_file(rs, path)
# print(top_10_words)
return top_10_words
def print_topic_coherence_to_text_file(text_file_path, num_topics, lda_model, corpus, path_dict):
create_file(text_file_path)
# top_topics = lda_model.top_topics(corpus)
# avg_topic_coherence = sum([topic[1] for topic in top_topics]) / num_topics
# append_row_to_text_file(
# str('Average topic coherence: %.9f\n' % avg_topic_coherence),
# text_file_path
# )
dictionary = Dictionary.load(path_dict)
temp = dictionary[0] # This is only to "load" the dictionary.
id2word = dictionary.id2token
coherence_model_lda = CoherenceModel(model=lda_model, corpus=corpus, dictionary=id2word, coherence='u_mass')
coherence_lda = coherence_model_lda.get_coherence()
append_row_to_text_file(str('Coherence Score: %.9f\n' % coherence_lda),
text_file_path)
def calculate_mean_std_deviation(raw_dataset_csv_path, corpus_path,
dictionary_path, output_path):
with open(corpus_path, 'rb') as f:
corpus = pickle.load(f) # Bag of words
dictionary = Dictionary.load(dictionary_path)
raw_dataset = pandas.read_csv(raw_dataset_csv_path)
raw_words_count = 0
for text in raw_dataset[
'Submission_Text']: # Get words count from raw data
raw_words_count += len(text.split())
raw_mean = raw_words_count / len(raw_dataset['Submission_Text'])
words_count = 0
for word_id, word_count in dictionary.cfs.items(
): # Get words count from cleaned data
words_count += word_count
mean = words_count / len(corpus)
raw_std_deviation = 0 # standard deviation (from raw data)
for text in raw_dataset['Submission_Text']:
x = len(text.split())
raw_std_deviation += (x - raw_mean) * (x - raw_mean)
raw_std_deviation /= len(raw_dataset['Submission_Text'])
raw_std_deviation = math.sqrt(raw_std_deviation)
std_deviation = 0 # standard deviation (from cleaned data)
for doc in corpus:
x = 0 # word count for doc
for word in doc:
x += word[1]
std_deviation += (x - mean) * (x - mean)
std_deviation /= len(corpus)
std_deviation = math.sqrt(std_deviation)
if not os.path.exists(output_path):
create_file(output_path)
rs_text = f'raw_mean = {raw_mean}\traw_stdDeviation = {raw_std_deviation}\n' \
f'mean = {mean}\tstd_deviation = {std_deviation}'
append_row_to_text_file(string=rs_text,
path=output_path) # Output to txt file
def print_topics_to_text_file(lda_model, text_file_path, num_words):
for topic in lda_model.show_topics(num_words=num_words):
rs = str('Topic: ' + str(topic[0] + 1) + '\n'
+ str(topic[1]))
append_row_to_text_file(rs, text_file_path)
def print_perplexity_to_text_file(text_file_path, lda_model, corpus):
append_row_to_text_file(str('Log Perplexity: %.9f\n' % lda_model.log_perplexity(corpus)),
text_file_path)
