how to import data into R

R语言用于多元回归树分析，适用高版本的R。(Multiple regression tree analysis in R language)

说明：  成都市空气中的O3来源及分析，可用于大创项目(O3 source and analysis in air of Chengdu, which can be used in some projects)

主要是利用r语言做简单线性回归，一元线性回归(use r language to solve simple ols)

说明：  spei的R语言计算版本 用于计算干旱指数spei(R language computing version of spei)

说明：  一篇论文的GARCH in mean VAR(GARCH in mean VAR of a published paper)

说明：  R语言对数据进行Garch-M-Copula建模并利用EM算法估计相应的参数(Garch-m-copula is used to model the data in R language and EM algorithm is used to estimate the corresponding parameters)

在R中如何导入数据，主要是txt，csv，excel等数据格式的导入(how to imput data in R)

在各种边缘分布状态下，计算序列的风险值，尤其适用于极值理论。(Calculation of risk values)

SIR。。。。 传染病传播的SIR模型，很全，可直接应用仿真模拟 (SIR model the spread of infectious diseases, it is full, the simulation can be applied directly)(SIR model the spread of infectious diseases, it is full, the simulation can be applied directly)

说明：  通过本书，读者不仅能掌握使用R及相关算法包来快速解决实际问题的方法，而且能从实际问题分析入手，到利用R进行求解，以及对挖掘结果进行分析的全面训练(Through this book, readers can not only master the method of using R and relevant algorithm packages to quickly solve practical problems, but also start from the analysis of practical problems to the comprehensive training of using R to solve problems and analyzing mining results)