什麼是資料框？

R for Finance 入門

Lore Dirick

Manager of Data Science Curriculum at Flatiron School

資料框

	欄 1	欄 2	欄 3
第 1 列	data	1	TRUE
第 2 列	more data	2	TRUE
第 3 列	even more data	3	TRUE
第 4 列	enough data	4	FALSE

資料框與欄位名稱

name <- c("Dan", "Dan", "Dan", "Rob", "Rob", "Rob")
payment <- c(100, 200, 150, 50, 75, 100)

debt <- data.frame(name, payment)
debt

  name payment
1  Dan     100
2  Dan     200
3  Dan     150
4  Rob      50
5  Rob      75
6  Rob     100

替資料框命名！

name <- c("Dan", "Dan", "Dan", "Rob", "Rob", "Rob")
payment <- c(100, 200, 150, 50, 75, 100)
debt <- data.frame(name, payment)

colnames(debt) <- c("friend", "money")
debt

  friend money
1    Dan   100
2    Dan   200
3    Dan   150
4    Rob    50
5    Rob    75
6    Rob   100

debt <- data.frame(friend = name, money = payment)

一起來練習吧！

R for Finance 入門