Price deviations
In this exercise, you will focus on understanding the variability of product prices across different centers and dates. To accomplish this, you will calculate the standard deviation of prices for each product and compare them visually using a bar chart.
The necessary packages, DataFrames, Plots and Statistics, have already been imported for you. Also, the product DataFrame is readily available for your use.
This exercise is part of the course
Introduction to Data Visualization with Julia
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Group by commodities
grouped = ____(product, :____)