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변수명 다루기 |
1. 화면
2. 코드 설명
df_raw <-data.frame(var1=c(1,2,1),
var2=c(2,3,2))
df_raw
install.packages("dplyr")
library(dplyr)
df_new <-df_raw
df_new <- rename(df_new, v2=var2)
df_new
library(ggplot2)
mpg_new <- mpg
head(mpg_new)
mpg_new <- rename(mpg_new, city=cty)
df<-data.frame(var1=c(4,3,8),
var2=c(2,6,1))
df
df$var_sum <-df$var1+df$var2
df
df$var_mean <- (df$var1+df$var2)/2
df
mpg$total<-(mpg$cty + mpg$hwy)/2
head(mpg)
mean(mpg$total)
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