When this error might occur
Consider an example in which we have a vector initialized with 5 five values.
R
# Initializing a vector vect = c(5, 8, 4, 12, 15) |
Now suppose we want to iterate over the vector and at each step of the iteration we want to assign the sum of the current value and the value stored at the previous position at the current position.
R
# Initializing a vector vect = c(5, 8, 4, 12, 15) # Iterate over the vector for (i in 1 : length(vect)) { # Assign sum vect[i] = vect[i] + vect[i - 1] } |
Output:
Output
The R compiler produces this error because of the case:
vect[1] = vect[1] + vect[0]
This is because indexing in R begins from 1. Hence, vect[0] doesn’t exist.
We can confirm that vect[0] doesn’t exist by simply printing the value:
Example:
R
# Print the value stored at the index 0 print(vect[0] |
Output:
Output
The output is a numeric vector having a length equal to zero.
How to Fix in R: Replacement has length zero
In this article, we will discuss how to fix the error of replacement has length zero in the R programming language.