質問編集履歴
2
df_3の数値を修正しました
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#実行後のイメージ
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data_3={"category":["a","a","a","b","b","c","c","c","c"],"num":[10,8,5,6,
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data_3={"category":["a","a","a","b","b","c","c","c","c"],"num":[10,8,5,6,5,13,9,5,2]}
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df_3= pd.DataFrame(data_3)
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### 前提・実現したいこと
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df_2の"num"の数値をdf_1にある"categoryの個数毎に上位の数値順に取得した列をdf_1に追加し、df_3を作りたいと考えていますが、方法がわかりません。
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教えていただけないでしょうか
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import numpy as np
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#実行前のデータ
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data_1 = {"category":["a","a","a","b","b","c","c","c","c"]}
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df_1 = pd.DataFrame(data_1)
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df_2 = pd.DataFrame(data_2)
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#実行後のイメージ
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data_3={"category":["a","a","a","b","b","c","c","c","c"],"num":[10,8,5,6,3,13,9,5,2]}
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df_3= pd.DataFrame(data_3)
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```
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修正
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df_1をdf_2の数値に基づいて、df_3にしたいと考えています。
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