adsp-519

dim(iris)

## [1] 150   5

ls(iris)

## [1] "Petal.Length" "Petal.Width"  "Sepal.Length" "Sepal.Width"  "Species"

rm(list=ls())
ls()

## character(0)

mean(mtcars$mpg)

## [1] 20.09062

median(mtcars$mpg)

## [1] 19.2

quantile(mtcars$mpg)

##     0%    25%    50%    75%   100% 
## 10.400 15.425 19.200 22.800 33.900

IQR(mtcars$mpg)

## [1] 7.375

summary(iris)

##   Sepal.Length    Sepal.Width     Petal.Length    Petal.Width   
##  Min.   :4.300   Min.   :2.000   Min.   :1.000   Min.   :0.100  
##  1st Qu.:5.100   1st Qu.:2.800   1st Qu.:1.600   1st Qu.:0.300  
##  Median :5.800   Median :3.000   Median :4.350   Median :1.300  
##  Mean   :5.843   Mean   :3.057   Mean   :3.758   Mean   :1.199  
##  3rd Qu.:6.400   3rd Qu.:3.300   3rd Qu.:5.100   3rd Qu.:1.800  
##  Max.   :7.900   Max.   :4.400   Max.   :6.900   Max.   :2.500  
##        Species  
##  setosa    :50  
##  versicolor:50  
##  virginica :50  
##                 
##                 
##