Read the first 6 data
## height weight
## 1 58 115
## 2 59 117
## 3 60 120
## 4 61 123
## 5 62 126
## 6 63 129
List all values of the data by column or variable
As you can see, there are two variables (height and weight) in the data
## $height
## [1] 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
##
## $weight
## [1] 115 117 120 123 126 129 132 135 139 142 146 150 154 159 164
List all values of the data and seems different column data as same column
## [1] 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 115 117 120 123
## [20] 126 129 132 135 139 142 146 150 154 159 164