机构地区: 华南理工大学计算机科学与工程学院广东省计算机网络重点实验室
出 处: 《广西师范大学学报(自然科学版)》 2007年第2期119-122,共4页
摘 要: 在信息检索领域,查全率与查准率是一对相互制约的指标。为了研究文本分类领域查全率和查准率的关系,在此从理论和实验两方面分析查全率及测试集对查准率的影响。理论分析与实验结果一致得出,在文本分类中查全率和查准率是两个一致的指标。另外,在查全率确定的情况下,测试集中各类别文档比例的变化也会导致查准率的变化。 In information retrieval, recall and precision are regarded as two inter-constraint measures. In order to discuss the relation of recall and precision in text categorization ,the impact of recall and test sets on precision is analyzed through theory and experiment respectively. In text categorization, recall and precision are consistent. In addition,if recall is confirmed ,precision is still influenced by the portion of documents in test sets.
领 域: [自动化与计算机技术] [自动化与计算机技术]