R學習筆記(維護DATAFRAME)

1. 建立DATAFRAME

ProductRevenue <- c(70,120,280,30,410) 
Months <- c("Mar","Apr","May","Jun","Jul")
prodinfor <- data.frame(Months,ProductRevenue)
prodinfor

2. 檢視columnName

colnames(prodinfor)

3. 檢視RowName

row.names(prodinfor)

4. 修改一個欄位

colnames(prodinfor)[1] <- "M"
colnames(prodinfor)

5. 修改兩個欄位

colnames(prodinfor) <- c("Month" , "ProdRev")
colnames(prodinfor)