Python——计算 Pandas DataFrame 列值的中间值
要计算列值的中间值,请使用 median() 方法。首先,导入所需的 Pandas 库 −
import pandas as pd
现在,创建一个有两个列的 DataFrame −
dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } )
使用 median() 查找单个列“Units”的中间值 −
print"Median of Units column from DataFrame1 = ",dataFrame1['Units'].median()
我们以同样的方式从第二个 DataFrame 中计算中间值。
示例
以下为完整代码 −
import pandas as pd # Create DataFrame1 dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } ) print"DataFrame1 ...\n",dataFrame1 # Finding median of "Units" column values print"Median of Units column from DataFrame1 = ",dataFrame1['Units'].median() # Create DataFrame2 dataFrame2 = pd.DataFrame( { "Product": ['TV', 'PenDrive', 'HeadPhone', 'EarPhone', 'HDD', 'SSD'], "Price": [8000, 500, 3000, 1500, 3000, 4000] } ) print"\nDataFrame2 ...\n",dataFrame2 # Finding median of "Price" column values print"Median of Price column from DataFrame2 = ",dataFrame2['Price'].median()
输出
这将产生以下输出 −
DataFrame1 ... Car Units 0 BMW 100 1 Lexus 150 2 Audi 110 3 Tesla 80 4 Bentley 110 5 Jaguar 90 Median of Units column from DataFrame1 = 105.0 DataFrame2 ... Price Product 0 8000 TV 1 500 PenDrive 2 3000 HeadPhone 3 1500 EarPhone 4 3000 HDD 5 4000 SSD Median of Price column from DataFrame2 = 3000.0
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