Custom Function Development in R
Instruction: Explain the process of writing and optimizing a custom function in R for a specific data analysis task.
Context: This question tests the candidate's ability to extend R's functionality through custom functions, a key skill for advanced data analysis.
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Defining the Function: I start by specifying the function parameters, which in our case could include the sales data vector, the time window for the moving average, and any other options pertinent to the analysis, such as handling NA values. R calculateMovingAverage <- function(sales_data, window_size, na_rm = TRUE) { # Function body to be filled in } Writing the Function Body: Next, within the function body, I implement the logic to calculate the moving average...