Python Pandas CategoricalIndex - 獲取此分類的類別程式碼
若要獲取此分類的類別程式碼,請在 Pandas 中使用 CategoricalIndex 的 codes 屬性。首先,匯入所需的庫 −
import pandas as pd
CategoricalIndex 只能採用有限且通常是固定的許多可能值(類別)。使用 "categories" 引數為分類設定類別。使用 "ordered" 引數將 分類標記為有序。程式碼是整數陣列,它們是類別陣列中實際值的位置 −
catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], ordered=True, categories=["p", "q", "r", "s"])
顯示分類索引 −
print("Categorical Index...\n",catIndex)
獲取類別程式碼 −
print("\nCategory codes from CategoricalIndex...\n",catIndex.codes)示例
以下為程式碼 −
import pandas as pd
# CategoricalIndex can only take on a limited, and usually fixed, number of possible values
# Set the categories for the categorical using the "categories" parameter
# Treat the categorical as ordered using the "ordered" parameter
# Codes are an array of integers which are the positions of the actual values in the categories array.
catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], ordered=True, categories=["p", "q", "r", "s"])
# Display the Categorical Index
print("Categorical Index...\n",catIndex)
# Get the categories
print("\nDisplayingCategories from CategoricalIndex...\n",catIndex.categories)
# Get the category codes
print("\nCategory codes from CategoricalIndex...\n",catIndex.codes)輸出
這將產生以下輸出 −
Categorical Index... CategoricalIndex(['p', 'q', 'r', 's', 'p', 'q', 'r', 's'], categories=['p', 'q', 'r', 's'], ordered=True, dtype='category') DisplayingCategories from CategoricalIndex... Index(['p', 'q', 'r', 's'], dtype='object') Category codes from CategoricalIndex... [0 1 2 3 0 1 2 3]
廣告
資料結構
網路
RDBMS
作業系統
Java
iOS
HTML
CSS
Android
Python
C 程式設計
C++
C#
MongoDB
MySQL
Javascript
PHP