如何计算 Pandas 序列中每个项的频率?
在本程序中,我们将计算 Pandas 序列中每个元素的频率。熊猫库中名为 value_counts() 的函数帮助我们找到元素的频率。
算法
Step 1: Define a Pandas series. Step 2: Print the frequency of each item using the value_counts() function.
示例代码
import pandas as pd series = pd.Series([10,10,20,30,40,30,50,10,60,50,50]) print("Series:\n", series) frequency = series.value_counts() print("\nFrequency of elements:\n", frequency)
输出
Series: 0 10 1 10 2 20 3 30 4 40 5 30 6 50 7 10 8 60 9 50 10 50 dtype: int64 Frequency of elements: 50 3 10 3 30 2 20 1 40 1 60 1 dtype: int64
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