Error: 'list' object cannot be coerced to type 'double'

This error occurs when you try to perform a mathematical operation or function on a list (which is a collection of objects) when the function or operation is designed to work with numerical values (represented as doubles).

For example, if you have a list of numbers and you try to calculate the mean of the list using the mean() function, but the list is not converted to a numerical vector, you will get this error.

To fix this error, you need to convert the list to a numerical vector using the as.numeric() function before performing mathematical operations or functions.

Example:

my_list <- c(1, 2, 3, 4, 5)
mean(my_list) # this will give the error

# Fix:
my_list_numeric <- as.numeric(my_list)
mean(my_list_numeric) # this will give the correct mean value