![statistics - How can I aggregate/combine 3 columns of a data frame into one column with the sum of the values of the other three in R? - Data Science Stack Exchange statistics - How can I aggregate/combine 3 columns of a data frame into one column with the sum of the values of the other three in R? - Data Science Stack Exchange](https://i.stack.imgur.com/YHVJy.png)
statistics - How can I aggregate/combine 3 columns of a data frame into one column with the sum of the values of the other three in R? - Data Science Stack Exchange
![dataframe - R: Combine list of data frames into single data frame, add column with list index - Stack Overflow dataframe - R: Combine list of data frames into single data frame, add column with list index - Stack Overflow](https://i.stack.imgur.com/XsYkl.png)
dataframe - R: Combine list of data frames into single data frame, add column with list index - Stack Overflow
![Combine Two Data Frames with Different Variables by Rows in R (Example) | bind_rows Function [dplyr] - YouTube Combine Two Data Frames with Different Variables by Rows in R (Example) | bind_rows Function [dplyr] - YouTube](https://i.ytimg.com/vi/uRWHUHWYL0w/maxresdefault.jpg)