Python Pandas - 從索引物件返回相對頻率
如需從 Index 物件返回相對頻率,請將 index.value_counts() 方法與引數 normalize 一起使用,並將其設為 True。
首先,匯入必需的庫 -
import pandas as pd
建立 Pandas 索引 -
index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 30])
顯示 Pandas 索引 -
print("Pandas Index...\n",index)使用 value_counts() 獲取唯一值的計數。將引數“normalize”設為 True 以獲取相對頻率 -
print("\nGet the relative frequency by dividing all values by the sum of values...\n", index.value_counts(normalize=True))示例
以下為程式碼 -
import pandas as pd
# Creating Pandas index
index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 30])
# Display the Pandas index
print("Pandas Index...\n",index)
# Return the number of elements in the Index
print("\nNumber of elements in the index...\n",index.size)
# Return the dtype of the data
print("\nThe dtype object...\n",index.dtype)
# Get the count of unique values using value_counts()
# Set the parameter "normalize" to True to get the relative frequency
print("\nGet the relative frequency by dividing all values by the sum of values...\n", index.value_counts(normalize=True))輸出
這將生成以下輸出 -
Pandas Index... Int64Index([50, 10, 70, 110, 90, 50, 110, 90, 30], dtype='int64') Number of elements in the index... 9 The dtype object... int64 Get the relative frequency by dividing all values by the sum of values... 50 0.222222 110 0.222222 90 0.222222 10 0.111111 70 0.111111 30 0.111111 dtype: float64
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