开开_王子的博客

1、条形图—barplot()barplot(c(1,2,4,2,6,4,3,5))barplot(c(1,2,4,2,6,4,3,5), horiz = TRUE)counts = table(Arthritis$Improved)barplot(counts, horiz = TRUE)counts = table(Arthritis$Improved, Arthritis$Tr...

1、字符串处理nchar("abcde") # 字符串长度substr("abcdef", 3, 5) #按索引取出子串grep("a", c("a", "b", "a", "c")) # 得到"a"所在索引sub("a", "A", "abcde") # 将字符串中“a”替换成"A"strsplit("abcde", "c") # 按“c”将字符串分割paste("Today is"...

dose <- c(20,30,40,45,60)dragA <- c(16,20,27,40,60)dragB <- c(15,18,25,31,40)plot(dose,dragA,type="b")plot(dose,dragB,type="b") opar <- par(no.readonly = TRUE)par(lty=2, pch=17)p...

R语言导入数据，有键盘手动输入，读取文件方式，数据库导入方式。1、键盘输入mydata <- data.frame(age=numeric(0),weight=numeric(0), gender=character(0))fix(mydata)2、读取文件# 读取txt文件，文件编码格式为ANSI格式data <- read.table(路径， header=TRUE,...