The error message “error in usemethod(“mutate”) : no applicable method for ‘mutate’ applied to an object of class “c(‘double’, ‘numeric’)”” occurs when the mutate function is called on an object of class “double” or “numeric,” but there is no corresponding method defined for these classes.
In R, the mutate function is used to add new variables or modify existing variables in a data frame. However, it can only be used with data frames or tibbles, and not with objects of classes such as “double” or “numeric.”
To resolve this error, make sure that you are using the mutate function with a data frame or tibble. If you are using a different object, such as a vector, you might need to convert it to a data frame or tibble before applying mutate. Alternatively, if you are trying to perform an operation that is not supported by mutate, consider using a different function or approach to achieve your desired result.
Example:
# Creating a data frame
data <- data.frame(x = 1:5, y = 6:10)
# Applying mutate on the data frame
mutated_data <- dplyr::mutate(data, z = x + y)
# Outputting the mutated data frame
print(mutated_data)
In the above example, the mutate function is applied to a data frame called "data." It adds a new variable "z" to the data frame by performing an operation on the existing variables "x" and "y." The resulting mutated data frame is then printed.