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編集

2018/11/27 08:13

投稿

kohekoh
kohekoh

スコア140

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@@ -3,9 +3,8 @@
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  ```python
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  import pandas as pd
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  import numpy as np
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- data = np.array([["a",1],["b",1],["c",2],["a",1]])
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+ data = {"user":["a","b","c","a","a"],"num":[5,6,7,8,9]}
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  df = pd.DataFrame(data)
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- df.columns = ["user","num"]
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  ```
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  このときに例えば,user列のaについてのnum列の平均をとりたい場合は

1

追加

2018/11/27 08:12

投稿

kohekoh
kohekoh

スコア140

title CHANGED
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body CHANGED
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