r replace variable name in script

Question

I want to replace all the names of a specific variable in my script (such as the shift + enter in matlab). For exemple in the R script I could have:

var <- 1 + 2
var2 <- var * 5

That I want to change to :

var1 <- 1 + 2
var2 <- var1 * 5

The point is to avoid the "search an replace" that would have change the second variable in var12 .

Answer 1

Search for var(?![1:9]) and replace with var1 . Use regex search. The regex asserts that only var is matched which is not followed by any number.