查看和更改R语言工作空间
getwd() 显示当前工作空间
setwd()更改当前工作空间
列出当前工作空间的对象
ls()
rm() 移除（删除）一个或多个对象
> ls() [1] "b" "c" "course" "d" "dat1" "depart" "dim1" [8] "dim2" "dim3" "en" "grade" "i" "id" "math" [15] "mylist" "name" "sc" "Score" "setdata" "student" "sum" [22] "x" "y" > rm(b,c,d) > ls() [1] "course" "dat1" "depart" "dim1" "dim2" "dim3" "en" [8] "grade" "i" "id" "math" "mylist" "name" "sc" [15] "Score" "setdata" "student" "sum" "x" "y"
q()退出R
q()
library()能显示有多少个程序包
R程序包是多个函数的集合
> library() 图书馆‘D:/R-3.5.1/library’里有个程辑包： base The R Base Package boot Bootstrap Functions (Originally by Angelo Canty for S) class Functions for Classification cluster "Finding Groups in Data": Cluster Analysis Extended Rousseeuw et al. codetools Code Analysis Tools for R compiler The R Compiler Package datasets The R Datasets Package foreign Read Data Stored by 'Minitab', 'S', 'SAS', 'SPSS', 'Stata', 'Systat', 'Weka', 'dBase', ... graphics The R Graphics Package grDevices The R Graphics Devices and Support for Colours and Fonts grid The Grid Graphics Package KernSmooth Functions for Kernel Smoothing Supporting Wand & Jones (1995) lattice Trellis Graphics for R MASS Support Functions and Datasets for Venables and Ripley's MASS Matrix Sparse and Dense Matrix Classes and Methods methods Formal Methods and Classes mgcv Mixed GAM Computation Vehicle with Automatic Smoothness Estimation nlme Linear and Nonlinear Mixed Effects Models nnet Feed-Forward Neural Networks and Multinomial Log-Linear Models parallel Support for Parallel computation in R rpart Recursive Partitioning and Regression Trees spatial Functions for Kriging and Point Pattern Analysis splines Regression Spline Functions and Classes stats The R Stats Package stats4 Statistical Functions using S4 Classes survival Survival Analysis tcltk Tcl/Tk Interface tools Tools for Package Development translations The R Translations Package utils The R Utils Package