[Study Log] Python pandas.DataFrame.fillna

[haonly]

Python 결측값 채우기: df.fillna()

1. 결측값을 특정 값으로 채우기

import pandas as pd
import numpy as np

df_0 = df.fillna(0)

2. 결측값을 앞 방향 혹은 뒷 방향으로 채우기 (fill gaps forward or backward)

import pandas as pd
import numpy as np

df.fillna(method='ffill') # Fill values forward
df.fillna(method='pad') # Fill values forward

df.fillna(method='bfill') # Fill values backward
df.fillna(method='backfill') # Fill values backward