def main():
# train_data = {
# 'test/spam1' : 'spam',
# 'test/spam2' : 'spam',
# 'test/spam3' : 'spam',
# 'test/spam4' : 'spam',
# 'test/ham1' : 'ham',
# 'test/ham2' : 'ham',
# 'test/ham3' : 'ham',
# 'test/ham4' : 'ham',
# }
#
# Setup
train_data, test_data = parse_labels()
stats(test_data)
test_data = {
'test/test0' : 'spam',
}
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Generating Counts"
word_dict, spam_count, ham_count = create_word_counts(train_data)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Done."
# Iterate through possible values of lambda for lambda smoothing.
# la_set = [0.005, 0.1, 0.5, 1.0, 2.0]
la_set = [0]
for la in la_set:
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Computing Probs for lambda={0}".format(la)
word_probs = compute_probs(word_dict, spam_count, ham_count, la)
spam_prior_prob = (float)(spam_count) / (spam_count + ham_count)
ham_prior_prob = (float)(ham_count) / (spam_count + ham_count)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Done"
TP, FP, TN, FN, problems = classify(test_data, word_probs, spam_prior_prob, ham_prior_prob)
summarize_findings(la, TP, FP, TN, FN, problems)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Generating Counts"
word_dict, total_doc_count, spam_doc_count, ham_doc_count = create_word_counts(train_data)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Done."
la = 2.000
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Computing Probs for lambda={0}".format(la)
word_probs = compute_probs(word_dict, spam_doc_count, ham_doc_count, la)
spam_prior_prob = (float)(spam_doc_count) / (spam_doc_count + ham_doc_count)
ham_prior_prob = (float)(ham_doc_count) / (spam_doc_count + ham_doc_count)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Spam Prior Prob : {0}".format(spam_prior_prob)
print datetime.datetime.now().strftime("%I:%M:%S") + " : " + " Ham Prior Prob : {0}".format(ham_prior_prob)
best_mi = compute_mi(word_probs, spam_prior_prob, ham_prior_prob)
top_200 = best_mi[0:200]
print [word[0] for word in top_200]
mi_word_probs = {}
for (word, mi) in top_200:
mi_word_probs[word] = word_probs[word]
mi_word_probs["*"] = word_probs["*"]
TP, FP, TN, FN = classify(test_data, mi_word_probs, spam_prior_prob, ham_prior_prob)
summarize_findings(TP, FP, TN, FN)
print "Done."
if __name__ == "__main__":
main()
