Get to grips with key data visualization and predictive analytic skills using R
About This Book
Acquire predictive analytic skills using various tools of RMake predictions about future events by discovering valuable information from data using RComprehensible guidelines that focus on predictive model design with real-world data
Who This Book Is For
If you are a statistician, chief information officer, data scientist, ML engineer, ML practitioner, quantitative analyst, and student of machine learning, this is the book for you. You should have basic knowledge of the use of R. Readers without previous experience of programming in R will also be able to use the tools in the book.
What You Will Learn
Customize R by installing and loading new packagesExplore the structure of data using clustering algorithmsTurn unstructured text into ordered data, and acquire knowledge from the dataClassify your observations using Naive Bayes, k-NN, and decision treesReduce the dimensionality of your data using principal component analysisDiscover association rules using AprioriUnderstand how statistical distributions can help retrieve information from data using correlations, linear regression, and multilevel regressionUse PMML to deploy the models generated in R
In Detail
R is statistical software that is used for data analysis. There are two main types of learning from data: unsupervised learning, where the structure of data is extracted automatically; and supervised learning, where a labeled part of the data is used to learn the relationship or scores in a target attribute. As important information is often hidden in a lot of data, R helps to extract that information with its many standard and cutting-edge statistical functions.
This book is packed with easy-to-follow guidelines that explain the workings of the many key data mining tools of R, which are used to discover knowledge from your data.
You will learn how to perform key predictive analytics tasks using R, such as train and test predictive models for classification and regression tasks, score new data sets and so on. All chapters will guide you in acquiring the skills in a practical way. Most chapters also include a theoretical introduction that will sharpen your understanding of the subject matter and invite you to go further.
The book familiarizes you with the most common data mining tools of R, such as k-means, hierarchical regression, linear regression, association rules, principal component analysis, multilevel modeling, k-NN, Naive Bayes, decision trees, and text mining. It also provides a description of visualization techniques using the basic visualization tools of R as well as lattice for visualizing patterns in data organized in groups. This book is invaluable for anyone fascinated by the data mining opportunities offered by GNU R and its packages.
Style and approach
This is a practical book, which analyzes compelling data about life, health, and death with the help of tutorials. It offers you a useful way of interpreting the data that's specific to this book, but that can also be applied to any other data.
About the Author
Eric Mayor
Eric Mayor is a senior researcher and lecturer at the University of Neuchatel, Switzerland. He is an enthusiastic user of open source and proprietary predictive analytics software packages, such as R, Rapidminer, and Weka. He analyzes data on a daily basis and is keen to share his knowledge in a simple way.
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这本书的封面设计得非常简洁有力,那种深邃的蓝色调立刻就能抓住眼球,让人感觉到里面蕴含着专业和深厚的知识。我本来是抱着试试看的心态翻开的,毕竟市面上关于数据分析的书籍已经汗牛充栋,很难再有让人眼前一亮的作品。然而,这本书的开篇就展现出一种不同于其他教材的叙事方式。它没有一开始就抛出复杂的公式和晦涩难懂的理论,而是通过几个非常贴近实际商业场景的小故事引入,让人迅速进入状态,理解为什么我们需要预测模型,以及这些模型在实际决策中能发挥多大的作用。作者的文笔流畅自然,即便是对于初学者来说,也丝毫没有阅读障碍。更让我惊喜的是,它对数据清洗和预处理的环节着墨颇多,这一点往往是很多入门书籍会一带而过的地方。作者强调了“垃圾进,垃圾出”的原则,用生动的例子说明了原始数据质量对最终模型效力的决定性影响。这种注重基础、强调实践的态度,让我对后续内容的学习充满了期待,感觉这不只是一本工具书,更像是一位经验丰富的导师在手把手地教你如何像一个真正的分析师那样思考问题。
评分我花了整整一个周末的时间才啃完了前三章,感觉收获远超预期,尤其是在模型解释性方面。这本书并没有满足于教读者如何调用R包得出结果,而是深入探讨了模型背后的“黑箱”原理,这一点对我这个偏爱理解底层逻辑的人来说简直是福音。作者非常细致地拆解了像逻辑回归、决策树这类经典模型,不仅展示了它们的数学基础,更重要的是,提供了大量可视化方法来解释“为什么模型会这样预测”。比如,关于特征重要性的讲解部分,作者用了一个非常巧妙的交互式图表来展示不同变量对结果影响的方向和程度,比起枯燥的表格数据,这种可视化呈现方式效率高太多了。我立刻将书中提到的几种解释性工具应用到了我正在进行的一个小型项目中,效果立竿见影。之前我的报告总是被质疑“模型是如何得出这个结论的”,现在我完全有底气地用清晰、直观的语言来回应这些疑问。这本书真正做到了“授人以渔”,教会了我们如何不仅要会做预测,更要会解释预测。
评分如果让我总结这本书给我的最大触动,那一定是它对“业务导向”的强调。很多数据科学书籍专注于算法的数学优美性,而这本书始终没有忘记数据分析的最终目的——解决业务问题,创造价值。在介绍完各种复杂模型之后,作者总是会回到一个核心问题:“这个模型的预测结果如何转化为可执行的商业决策?”书中提供了一个贯穿始终的案例——一家电商网站的用户流失预测,作者一步步演示了如何从定义业务目标、收集数据、选择指标、构建模型,到最终向管理层汇报结果。这种完整的项目生命周期展示,对于那些刚从学术界转入工业界,或者希望在团队中承担更多端到端责任的人来说,是无价的。它不仅是技术手册,更是一本关于如何将技术能力转化为商业影响力的指南。这本书让我对数据分析师的角色有了更清晰、更具战略性的理解,它教会我如何让我的模型“说话”,并最终为业务带来实实在在的增益。
评分这本书的配套代码和资源管理做得可以说是教科书级别的典范。我最怕的就是那种理论讲得天花乱坠,结果代码一跑就报错的书。但这本书在这方面做得非常严谨。作者不仅在GitHub上提供了所有章节对应的完整代码库,而且代码块的注释详尽到令人发指——几乎每一行关键操作都有清晰的说明。更值得称赞的是,作者并没有使用过于前沿或小众的R包,而是集中精力打磨那些经过时间检验、社区支持稳定的核心库,确保了代码的健壮性和可移植性。这对于那些希望将所学知识应用到公司现有生产环境中的专业人士来说,无疑是巨大的加分项。我注意到,在涉及时间序列分析的部分,作者甚至考虑到了不同操作系统环境下包版本可能带来的兼容性问题,并提供了相应的解决方案链接。这种对细节的极致关注,体现了作者深厚的实战经验和对读者学习体验的尊重,让人感觉作者是真心希望读者能够成功地将理论转化为实践。
评分坦白说,这本书的深度已经超出了我最初对一本“入门级”读物的期待。当读到关于模型泛化能力和过拟合/欠拟合辨识的章节时,我感觉自己仿佛在上一堂高级统计学的研讨课。作者没有回避机器学习中那些棘手的挑战,比如数据不平衡问题,而是提供了一整套系统的处理流程,从重采样技术到使用特定损失函数进行优化。特别是对交叉验证策略的讨论,作者对比了K折、留一法以及时间序列数据的滚动验证,并解释了每种方法的适用场景和潜在陷阱。这种辩证和全面的分析视角,极大地提升了我对模型构建的整体认知高度。它不再是简单的“选一个算法跑一遍”,而是一个需要权衡、试验和批判性思考的迭代过程。读完这些内容,我甚至开始重新审视过去自己构建的一些“满意”的模型,发现了许多之前忽略掉的优化点。这本书的价值在于,它不仅教会你如何“做”,更教会你如何“质疑”你所做的,引导你去追求更稳健、更可靠的预测结果。
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