You can draw bar graphs with the bar_plot command. You give it a list, whose elements are pairs of labels and values, and the result will be a bar graph with a bar for each label, whose height is given by the corresponding value. For example, if you enter
you will get
If you have more than one set of values for each label, you can use bar_plot to draw several bar graphs at the same time by including all values for each label, with a list of identifiers for the bar graphs given by the first argument. If you enter
you will get