Replacing the specific values in columns of data frame using gsub in R

Question

I have data.frame as follows

> df
ID      Value
A_001   DEL-1:7:35-8_1 
A_002   INS-4l:5_74:d
B_023   0 
C_891   2
D_787   8
E_865   DEL-3:65:1s:b
         


        

Answer 1

First letter is not digital:

df$value <- gsub("^\\D.*", "", df$value)

Or there is '-' in delete value:

df$value <- gsub(".*-.*", "", df$value)