要设置要排序的 CategoricalIndex 的类别,请使用as_ordered()Pandas 中的方法。
首先,导入所需的库 -
import pandas as pd
使用“categories”参数设置分类的类别 -
catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"])
获取类别 -
print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories)
设置要订购的类别 -
print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())
以下是代码 -
import pandas as pd # Set the categories for the categorical using the "categories" parameter catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"]) # 显示分类索引 print("CategoricalIndex...\n",catIndex) # 获取类别 print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories) # 设置要排序的类别 print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())输出结果
这将产生以下输出 -
CategoricalIndex... CategoricalIndex(['p', 'q', 'r', 's', 'p', 'q', 'r', 's'], categories=['p', 'q', 'r', 's'], ordered=False, dtype='category') Displaying Categories from CategoricalIndex... Index(['p', 'q', 'r', 's'], dtype='object') CategoricalIndex ordered... CategoricalIndex(['p', 'q', 'r', 's', 'p', 'q', 'r', 's'], categories=['p', 'q', 'r', 's'], ordered=True, dtype='category')