Python - 计算 Pandas DataFrame 的最大列值
要获取列值的最大值,请使用max () 函数。首先,导入所需的 Pandas 库 -
import pandas as pd
现在,创建一个包含两列的 DataFrame -
dataFrame1 = pd.DataFrame({
"Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'],"Units": [100, 150, 110, 80, 110, 90] }
)
使用max()-查找单列“单位”的最大值-
print"Maximum Units from DataFrame1 = ",dataFrame1['Units'].max()
以同样的方式,我们计算了第二个 DataFrame 的最大值。
示例
以下是完整的代码 -
import pandas as pd输出结果# Create DataFrame1
dataFrame1 = pd.DataFrame(
{
"Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'],"Units": [100, 150, 110, 80, 110, 90] }
)
print"DataFrame1 ...\n",dataFrame1
# Finding maximum value of a single column "Units"
print"Maximum Units from DataFrame1 = ",dataFrame1['Units'].max()
# Create DataFrame2
dataFrame2 = pd.DataFrame(
{
"Product": ['TV', 'PenDrive', 'HeadPhone', 'EarPhone', 'HDD', 'SSD'],"Price": [8000, 500, 3000, 1500, 3000, 4000]
}
)
print"\nDataFrame2 ...\n",dataFrame2
# Finding maximum value of a single column "Price"
print"Maximum Price from DataFrame2 = ",dataFrame2['Price'].max()
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
Maximum Units from DataFrame1 = 150
DataFrame2 ...
Price Product
0 8000 TV
1 500 PenDrive
2 3000 HeadPhone
3 1500 EarPhone
4 3000 HDD
5 4000 SSD
Maximum Price from DataFrame2 = 8000
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