Create a new variable based on the first 7 characters of existing variable

Question

I\'ve been struggling to create a new variable which contains only the first seven characters of an existing variable. Sorry if this if obvious but I\'ve struggled to find a

Answer 1

You need to store the output of substr(variable2, 1, 7) into variable2. Currently you're printing only

variable2<-mydata$variable
variable2<-substr(variable2, 1, 7)

Answer 2

You are passing wrong argument to substr

Try

variable2 <- substr(mydata$variable,1,7)