文件名称：An Introduction to R
文件大小：608KB
文件格式：PDF
更新时间：2021-07-02 09:44:46
数据分析 数据可视化
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. Among other things it has • an e ective data handling and storage facility, • a suite of operators for calculations on arrays, in particular matrices, • a large, coherent, integrated collection of intermediate tools for data analysis, • graphical facilities for data analysis and display either directly at the computer or on hardcopy, and • awelldeveloped,simpleande ectiveprogramminglanguage(called‘S’)whichincludes conditionals, loops, user de ned recursive functions and input and output facilities. (Indeed most of the system supplied functions are themselves written in the S language.) The term “environment” is intended to characterize it as a fully planned and coherent system, rather than an incremental accretion of very speci c and in exible tools, as is frequently the case with other data analysis software. R is very much a vehicle for newly developing methods of interactive data analysis. It has developed rapidly, and has been extended by a large collection of packages. However, most programs written in R are essentially ephemeral, written for a single piece of data analysis.