如何在DataFrame 中優雅的增加一行,一列
阿新 • • 發佈:2019-01-06
<font color=‘darkgreen’,size=4.5> 優雅的增加一行,一定要優雅!
df=DataFrame(np.arange(16).reshape((4,4)),index=['a','b','c','d'],columns=['one','two','three','four'])
df.loc['new_raw'] = '3' df Out[84]: one two three four a 0 1 2 3 b 4 5 6 7 c 8 9 10 11 d 12 13 14 15 new_raw 3 3 3 3
<font color=‘green’,size=4.5> 優雅的增加一列,一定要優雅!
df['new_colu']='12'#向 DataFrame 新增一列,該列為同一值 df Out[93]: one two three four new_colu a 0 1 2 3 12 b 4 5 6 7 12 c 8 9 10 11 12 d 12 13 14 15 12 new_raw 3 3 3 3 12