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The lapply() function
2. Example: list of weekly sales
Other apply() functions
The split-apply-combine pattern


Throughout the lessons, we'll analyze the sale of smart bracelets that can be purchased through the website of a fictional company named Smartcom. This company stores information about its past week of sales in a list named sales. This list contains seven members, each representing a given day of the week. Each of these members contains a vector of 24 elements denoting the number of bracelets sold within each hour.


Display the contents of the list named sales. Get familiar with that data.