75 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			75 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
 | |
| id: 5e9a093a74c4063ca6f7c15e
 | |
| title: DataFrame によるデータクリーニング
 | |
| challengeType: 11
 | |
| videoId: sTMN_pdI6S0
 | |
| bilibiliIds:
 | |
|   aid: 505597026
 | |
|   bvid: BV1Yg411c7bx
 | |
|   cid: 409018948
 | |
| dashedName: data-cleaning-with-dataframes
 | |
| ---
 | |
| 
 | |
| # --description--
 | |
| 
 | |
| *動画で説明しているように、notebooks.ai を使用する代わりに Google Colab を使用することができます。*
 | |
| 
 | |
| その他のリソース:
 | |
| 
 | |
| -   [GitHub のノート](https://github.com/ine-rmotr-curriculum/data-cleaning-rmotr-freecodecamp)
 | |
| -   [Google Colab を使用して GitHub からノートを開く方法](https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb)
 | |
| 
 | |
| # --question--
 | |
| 
 | |
| ## --text--
 | |
| 
 | |
| 次のコードは何を表示しますか?
 | |
| 
 | |
| ```py
 | |
| import pandas as pd
 | |
| import numpy as np
 | |
| 
 | |
| s = pd.Series([np.nan, 1, 2, np.nan, 3])
 | |
| s = s.fillna(method='ffill')
 | |
| 
 | |
| print(s)
 | |
| ```
 | |
| 
 | |
| ## --answers--
 | |
| 
 | |
| <pre>
 | |
| 0    1.0
 | |
| 1    1.0
 | |
| 2    2.0
 | |
| 3    3.0
 | |
| 4    3.0
 | |
| dtype: float64
 | |
| </pre>
 | |
| 
 | |
| ---
 | |
| 
 | |
| <pre>
 | |
| 0    NaN
 | |
| 1    1.0
 | |
| 2    2.0
 | |
| 3    2.0
 | |
| 4    3.0
 | |
| dtype: float64
 | |
| </pre>
 | |
| 
 | |
| ---
 | |
| 
 | |
| <pre>
 | |
| 0    NaN
 | |
| 1    1.0
 | |
| 2    2.0
 | |
| 3    NaN
 | |
| 4    3.0
 | |
| dtype: float64
 | |
| </pre>
 | |
| 
 | |
| ## --video-solution--
 | |
| 
 | |
| 2
 | |
| 
 |