How to know datatypes in R

In [1]:
# Datatypes

# load the libraries
library(mlbench)

# load the dataset
data(PimaIndiansDiabetes)

# list types for each attribute
sapply(PimaIndiansDiabetes, class)
pregnant
'numeric'
glucose
'numeric'
pressure
'numeric'
triceps
'numeric'
insulin
'numeric'
mass
'numeric'
pedigree
'numeric'
age
'numeric'
diabetes
'factor'
In [2]:
# Datatypes

# load the libraries
library(mlbench)

# load the dataset
data(iris)

# list types for each attribute
sapply(iris, class)
Sepal.Length
'numeric'
Sepal.Width
'numeric'
Petal.Length
'numeric'
Petal.Width
'numeric'
Species
'factor'
In [3]:
# Datatypes

# load the libraries
library(mlbench)

# load the dataset
data(BostonHousing)

# list types for each attribute
sapply(BostonHousing, class)
crim
'numeric'
zn
'numeric'
indus
'numeric'
chas
'factor'
nox
'numeric'
rm
'numeric'
age
'numeric'
dis
'numeric'
rad
'numeric'
tax
'numeric'
ptratio
'numeric'
b
'numeric'
lstat
'numeric'
medv
'numeric'