# prima riga
pulp[1, ]
## name age married
## 1 John 23 TRUE
# prima colonna
# matrix style
pulp[ ,1]
## [1] "John" "Samuel" "Uma" "Bruce" "Tim"
pulp[, "name"]
## [1] "John" "Samuel" "Uma" "Bruce" "Tim"
# list style
pulp$name
## [1] "John" "Samuel" "Uma" "Bruce" "Tim"
pulp[[1]]
## [1] "John" "Samuel" "Uma" "Bruce" "Tim"
# filtri
pulp[pulp$name == "Uma", ]
## name age married
## 3 Uma 17 FALSE
pulp[pulp$age < 18, ]
## name age married
## 3 Uma 17 FALSE
pulp[married == TRUE, "name"]
## [1] "John" "Bruce" "Tim"