Looping error in R

Question

g = 9.8
tt = c(10,15,16)
n = length(tt)
emp =NULL

for(i in n){
emp[i] = tt[i]*4
print(emp)
}

After running this code in R, i got reply like below:

 > for(i in n){
 + emp[i] = tt[i]*4
 + print(emp)
 + }
[1] NA NA 64

Any ideas about how to remove NA values or solve this problem?

Answer 1

You need a sequence to iterate over for your loop to work. By simply changing n to 1:n it will work.

g = 9.8
tt = c(10,15,16)
n = length(tt)
emp =NULL

for(i in 1:n){
  emp[i] = tt[i]*4
  print(emp)
}

[1] 40
[1] 40 60
[1] 40 60 64