"根据 R 中另一列的条件求和（或不求和）一个值"

Question

Let's imagine the following data. Columns A, B, and C. Column A contains years (eg.2022, 2025, 2030, etc). Column B contains a month (eg. 2, 7,8, etc). I need to create a column C that does the following "if else".

If B >=6, then C = A+1.
If B is smaller than 6, then C = A.

Can anyone help me please? Have a good day "

Answer 1

df$c <- ifelse(df$b >= 6, df$a+1, df$a)

Answer 2

Here is a dplyr<\/code> solution using an ifelse<\/code> statement:

library(dplyr)

df %>% 
  mutate(C = ifelse(B >= 6, A+1, A))