Simple for loop in R producing “replacement has length zero” in R

Question

I am a novice in R, and so what seemed to work fine in C and Python, surprisingly breaks down in R. I am trying to calculate the product of the first 1000 Fibonacci numbers.

Answer 1

Arrays in R are 1-based.

Fibonacci[1]<-1
Fibonacci[2]<-1
Product<-1
for (i in 3:1000)
{

(the remainder as in your question)

The problem is Fibonacci[0] which is a 0-length numeric. When i = 2, this expression has a right hand side of numeric(0):

Fibonacci[i]<-(Fibonacci[i-1])+(Fibonacci[i-2])