R -> 创建具有重复值的数据集

Question

我得到了解决以下问题的方法：

创建一个数据集，其中包含过去 4 年您的 4 位销售代表的营业额 (runif 500;1000) 整数值，每位销售人员销售 4 种不同的产品（Mars、Snickers、Bounty、Milkeyway）；另外添加一个带有整数 CostofSales (runif 50;150) 的列，最后在自己的列中计算收入。将所有值组合成一个数据框

所以我做到了：

Years <- rep(c(2021:2018),16)
Years

Sales <- rep(c("Chris","Lucas","Cara","Bia"),16)
View(Sales)                                                                                             

Product <- rep(c("Mars","Snickers","Bounty","Milkway"),16)
Product

Turnover <- c(runif(64,500,1000))
Turnover

df <- data.frame(Years,Sales,Product,Turnover)
View(df)

但是“数据框”搞砸了：

谁能帮帮我？谢谢你

Answer 1

也许这就是你想要的

Years <- rep(c(2021:2018), each=16)
Sales <- rep(rep(c("Chris","Lucas","Cara","Bia"), each=4),  4)
Product <- rep(c("Mars",  "Snickers", "Bounty", "Milkway"), 16)
Turnover <- runif(64, 500, 1000)

df <- data.frame(Years,Sales,Product,Turnover)
df[c(4, 8, 12, 16, 20, 24, 28, 32, 36), ]
#    Years Sales Product Turnover
# 4   2021 Chris Milkway 964.8695
# 8   2021 Lucas Milkway 799.1933
# 12  2021  Cara Milkway 613.6976
# 16  2021   Bia Milkway 970.3118
# 20  2020 Chris Milkway 598.2047
# 24  2020 Lucas Milkway 951.0657
# 28  2020  Cara Milkway 537.1925
# 32  2020   Bia Milkway 720.0880
# 36  2019 Chris Milkway 759.2236