如何计算Pandas 系列中每个物品的出现频率？
在此程序中，我们将计算熊猫系列中每个元素的频率。该功能value_counts()在大熊猫库可以帮助我们找到元件的频率。
算法
Step 1: Define a Pandas series. Step 2: Print the frequency of each item using the value_counts() function.
范例程式码
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)输出结果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