R. Why is this while loop not assigning varibles?

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I have been trying to get this R code to assign integers on the fly. It works when they are less than 99, but the else statement seems to not be working. I keep getting errors stating: object 'tmpvarname2' not found

R

parameters = c(6202, 5, 6401, 1)
listlength <- length(parameters)
sncount <- 1
tncount <-1
pcount <- 1

while(listlength>0) {
  
 if (parameters[pcount]>1000){
    tmpvarname1 <- assign(paste("sn", sncount, sep = ""),parameters[pcount])
   sncount <- sncount +1
  }
  
    if (parameters[pcount]<=99){
    tmpvarname2 <- assign(paste("tn", tncount, sep = ""),parameters[pcount])
    
   tncount <- tncount +1
   
    }
 listlength <- listlength-1
  pcount <- pcount +1
}
tmpvarname1
tmpvarname2

What I have tried:

I've tried using if - else with the second if statement as an else. Originally the full code read the parameters in as a text file, but even hard coding them did not fix that issue.

Posted 2-Aug-22 14:26pm

rscp1

Updated 3-Aug-22 22:17pm

OriginalGriff

v3

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Comments

Richard MacCutchan 3-Aug-22 3:56am

Most likely because tmpvarname1 and tmpvarname2 only exist within the relevant if blocks. Try declaring the variables before the while statement so they are globally available.

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Richard MacCutchan · Answer 1 · 2022-08-03T22:17:00

You need to declare tmpvarname1 and tmpvarname2 in the global space so they can be accessed inside and outside of the loop. You also need to use the global assignment operator (<<-) to update them inside the loop.

C

tmpvarname1 <- tmpvarname2 <- 0
while(listlength>0) {
  
 if (parameters[pcount]>1000){
    tmpvarname1 <<- assign(paste("sn", sncount, sep = ""),parameters[pcount])
   sncount <- sncount +1
  }
  
    if (parameters[pcount]<=99){
    tmpvarname2 <<- assign(paste("tn", tncount, sep = ""),parameters[pcount])
    
   tncount <- tncount +1
   
    }
 listlength <- listlength-1
  pcount <- pcount +1
}
tmpvarname1
tmpvarname2

You may want to do the same with sncount, tncount and pcount.

For further details see Scope of Variable in R - GeeksforGeeks[^].