u011569805的专栏

data<-read.csv("D:\\data1\\20130320a.csv",head=T) dataframe<- data.frame(chg=data$CHG,chg_pct=data$CHG_PCT,achg_pct=data$ACHG_PCT,turnover=data$TURNOVER,rows.names=data$STOCKCODE) scale<-scale(data

options(digits=2)Studeng <- c("John Davis", "Angela Williams", "Bullwinkle Moose", "David Jones", "Janice Markhammer", "Chery1 Cushing", "Reuven Ytzrhk", "Greg Knox", "Joel England", "Mary Rayburn")

1.age weight mean(weight)sd(weight)cor(age,weight)plot(age,weight)2.data() example("foo")3.getwd() setwd("") rm() savehistory("myfile") loadhistory("myfile")   save.image("") save(

1. 安装好 R, hive 后测试 命令行输入 命令能进入控制台，且无错误

1. library("xts")

1. dir.create() 函数 可以设置 chmod 权限dir.create(path, showWarnings = TRUE, recursive = FALSE, mode = "0777")Sys.chmod(paths, mode = "0777", use_umask = TRUE)Sys.umask(mode = NA)Sys.chmod(list.dirs(

1.环境搭建install.packages("rJava");在环境变量中 配置 R_HOME以及 Path 加上%R_HOME%/bin/｛位数文件夹｝把rjava 安装目录也加入 环境变量（可选，在eclipse 导入jar即可）2.public class Test { public static void main(String[] args) {

xyAplot(A$x,A$y)lm.reglm.regabline(lm.reg)summary(lm.reg)pointpointlm.predlm.pred

sum(x, na.rm = TRUE)na.omit() 删除不完整的观测（na jiqu）date() Sys.Date() as.Date(c("2007-06-22"), "%Y-%m-%d")today difftime(today, dob, units="weeks") strDates order(-age) 排序数据集合并 merge(A, B, by="ID" c("ID",