Python में मशीन लर्निंग के लिए फीचर इंजीनियरिंग
Robert O'Callaghan
Director of Data Science, Ordergroove
मुक्त टेक्स्ट का उदाहरण:
Senate और House of Representatives के सहनागरिकों: जीवन की घटनाओं में से कोई भी घटना मुझे उससे अधिक चिंतित नहीं कर सकती थी जिसकी सूचना आपके आदेश से भेजी गई और इस माह की तारीख को प्राप्त हुई।
print(speech_df.head())
Name Inaugural Address \
0 George Washington First Inaugural Address
1 George Washington Second Inaugural Address
2 John Adams Inaugural Address
3 Thomas Jefferson First Inaugural Address
4 Thomas Jefferson Second Inaugural Address
Date text
0 Thursday, April 30, 1789 Fellow-Citizens of the Sena...
1 Monday, March 4, 1793 Fellow Citizens: I AM again...
2 Saturday, March 4, 1797 WHEN it was first perceived...
3 Wednesday, March 4, 1801 Friends and Fellow-Citizens...
4 Monday, March 4, 1805 PROCEEDING, fellow-citizens...
[a-zA-Z]: सभी अक्षर करैक्टर[^a-zA-Z]: सभी गैर-अक्षर करैक्टरspeech_df['text'] = speech_df['text']\
.str.replace('[^a-zA-Z]', ' ')
पहले:
"Fellow-Citizens of the Senate and of the House of
Representatives: AMONG the vicissitudes incident to
life no event could have filled me with greater" ...
बाद में:
"Fellow Citizens of the Senate and of the House of
Representatives AMONG the vicissitudes incident to
life no event could have filled me with greater" ...
speech_df['text'] = speech_df['text'].str.lower()
print(speech_df['text'][0])
"fellow citizens of the senate and of the house of
representatives among the vicissitudes incident to
life no event could have filled me with greater"...
speech_df['char_cnt'] = speech_df['text'].str.len()
print(speech_df['char_cnt'].head())
0 1889
1 806
2 2408
3 1495
4 2465
Name: char_cnt, dtype: int64
speech_df['word_cnt'] =
speech_df['text'].str.split()
speech_df['word_cnt'].head(1)
['fellow', 'citizens', 'of', 'the', 'senate', 'and',...
speech_df['word_counts'] =
speech_df['text'].str.split().str.len()
print(speech_df['word_splits'].head())
0 1432
1 135
2 2323
3 1736
4 2169
Name: word_cnt, dtype: int64
speech_df['avg_word_len'] =
speech_df['char_cnt'] / speech_df['word_cnt']
Python में मशीन लर्निंग के लिए फीचर इंजीनियरिंग