R Programming By Example

Graphing top performers with bar graphs

Bar graphs are one of the most used graphing tools in the world and this chapter is no exception. In our last bar graph example, we will show how to graph the top performers for a given variable in the decreasing order. Our objective is to graph either PROFIT or Frequency in the y axis and a parameterized variable for the x axis. We want to show the top n performers for the x variable in a decreasing order from left to right, as is shown in the graph below.

Top n bar graphs

To accomplish this, we receive as parameters the data (sales in this case), the variable that will be used for the x axis x, the ...