Error in R : invalid (NULL) left side of assignment (2 Examples)

This tutorial explains how to resolve the “Error in X : invalid (NULL) left side of assignment” in R.

Example 1: How to Reproduce the Error – invalid (NULL) left side of assignment

max() <- 4                       # Assignment to function is not possible
# Error in max() <- 4 : invalid (NULL) left side of assignment

Example 2: How to Fix the Error – invalid (NULL) left side of assignment

my_data <- 7                     # Proper assignment of value
my_data                          # Displaying new data object
# [1] 7

Further Resources & Related Tutorials

In addition, you may have a look at some of the related articles on my website:

• read.table Error in file : invalid ‘description’ argument
• stripchart.default Error – invalid plotting method in R