Attribute of a Data Frame

attributes(sw)

$names
[1] "Fertility"   "Agriculture" "Examination" "Education"  

$row.names
[1] "Courtelary"   "Delemont"     "Franches-Mnt" "Moutier"      "Neuveville"  

$class
[1] "data.frame"

where:

• R - Class