摘要: 主成分分析是一种十分科学的分析方法,在社会多个领域上都有所涉及.在实际问题的研究中,多个指标的问题是会常遇到的.然而在多数的情况下,这些不同的指标之间常常存在着一定的相关性,这势必会给我们分析问题带来一定的复杂性.而在商业的经济中应用主成分分析可以将一些复杂的数据综合成几个商业指数形式,如生活费指数、物价指数、商业活动指数等.如上所述,现实中往往希望综合使用这些指标,这时,基于MATLAB使用主成分分析可以使数据的文度降低,同时又尽量的不使数据中的信息丢失.38157 毕业论文关键词: 主成分分析;降文;MATLAB;贡献率
Application of Principal Component Analysis in Practice
Abstract: Principal component analysis is a very scientific analysis method, it has been involved in many fields of society. In the actual research, multi index problem is often encountered. However, in most cases, between these different indicators often have certain relevance, this will bring problems some of the complexity analysis to us. And the application of the principal component in the commercial economy analysis can be integrated some complex data into several commercial index form, such as the cost of living index, price index, business activity index. As mentioned above, in reality often hoped to use these indicators, then, MATLAB using principal component analysis the dimension reduction based on the data, but also can not make the loss of information in the data.
Key words: Principal Component Analysis;Dimension Reduction;MATLAB;Rate of Contribution
目 录
摘要 1
引言 2
1 基础知识 3
1.1 基本概念和定义 3
1.1.1主成分分析的基本概念 3
1.1.2主成分分析的定义 3
1.2 主成分分析基本原理 4
1.3 主成分分析特点 4
1.4主成分的性质 4
1.5样本的主成分 5
2 主成分分析法的计算步骤 6
3 MATLAB的功用 7
4 实例应用 8
4.1 实例.1990年至2013年的城市公用事业基本情况 8
4.2 应用MATLAB进行问题分析 10
4.2.1 计算步骤 10
4.2.2 结果分析 14
5 结束语 16
附录 18
参考文献 22
致 谢 23