How to use add_column(newCol = str_extract(oldColumn, "pattern", .after = "oldColum" ) inside Exploratory?

add_column(MIPSGroup = str_extract(.$Dil_Plate_Name, "[:alnum:]+_([[:alnum:]&&[^P]]+(_CL)?)?|(KORgex)), .after="Dil_Plate_Name")

I cannot seem to get the add_column command to work inside Exploratory, although this works in R: <- str_extract(mips.manifest$`Dil plate name`, 

mips.manifest %<>%
  add_column(, .after="Dil_Plate_Name")

What am I doing wrong? Thanks!

You can do it with Mutate command, which you can start from