library(mlbench)
data("BostonHousing")
sapply(BostonHousing,class)
##      crim        zn     indus      chas       nox        rm       age       dis 
## "numeric" "numeric" "numeric"  "factor" "numeric" "numeric" "numeric" "numeric" 
##       rad       tax   ptratio         b     lstat      medv 
## "numeric" "numeric" "numeric" "numeric" "numeric" "numeric"

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