R for loop dataframe的問題，透過圖書和論文來找解法和答案更準確安心。 我們找到下列免費下載的地點或者是各式教學

另外網站Syntax 2: R's transform() function - 4 data wrangling tasks in R ...也說明：To add a profit margin column to our data frame with transform() we'd use: ... is whatever you want to be doing with each item you're iterating over.

最後網站how to add a column to a dataframe in r for loop code example則補充：Example: add columns to dataframe r loop for(i in 1:3) { # Head of for-loop new <- rep(i, nrow(data)) # Create new column data[ , ncol(data) + 1] <- new ...