Exercise2

<p><strong>Chapter 4/Exercise 2</strong></p><p>Read the file datetime_ex2.csv created in the previous exercise "Chapter 4/Exercise 2".</p><p>First, calculate the difference (in months) between the sales date and today. Keep only sales that are older than 12 months. Then, calculate the Moving Average to the sales trend. In this exercise, we apply two moving averages with different window size (11 and 21), and eventually compare them visually using a <em>Line Plot</em>.</p>