*This error occurs when you call the rep function to replicate data, but the value you provide to replicate the number is not a positive real number. You can solve this problem by ensuring that the number is a single, positive real number.*

*This tutorial will go through the error and how to solve it with code examples.*

## Table of contents

## The rep() Function in R

The rep function replicates elements of vectors and lists. The `times`

parameter of the function needs to be a non-negative number.

## Example #1: Using a negative number as the times argument in rep

Consider the following example of using the` rep()`

function to replicate the number 1 four times.

val <- rep(1, 4) val

Let’s run the code to see what happens:

1 1 1 1

We successfully retrieved a numeric vector of length `4`

consisting of the number `1`

.

Let’s try to use a negative number for the `times`

parameter.

val <- rep(1, -4) val

Let’s run the code to see the result:

Error in rep(1, -4) : invalid 'times' argument

The error occurs because we set the `times`

argument to a negative number when it needs to be a non-negative value only.

### Solution

We can solve the error by using a positive value for the `times`

argument. Let’s look at the revised code:

val <- rep(1, 4) val

Let’s run the code to see the result:

[1] 1 1 1 1

We successfully retrieved a numeric vector of length `4`

consisting of the number `1`

.

## Example #2: Using NA as the times argument in rep

The error can also occur if we use a `NA`

value as the `times`

argument. Consider the following example:

val <- rep(1, NA) val

Let’s run the code to see the result:

Error in rep(1, NA) : invalid 'times' argument

### Solution

We can solve this error by replacing the `NA`

value with a valid non-negative number.

val <- rep(1,5) val

Let’s run the code to see the result:

[1] 1 1 1 1 1

We successfully retrieved a numeric vector of length `5`

consisting of the number `1`

.

## Summary

Congratulations on reading to the end of this tutorial! If you encounter this error when passing a variable as the `times`

argument in the rep function, check if the value is negative or `NA`

beforehand, then replace it with a valid non-negative number.

Go to the online courses page on R to learn more about coding in R for data science and machine learning.

For further reading on data analysis with R, go to the article: How to Download and Plot Stock Prices with quantmod in R

Have fun and happy researching!