The arguments used in the graph functions should be looked over briefly before proceeding to this section. These arguments are explained in the section on graphical parameters and can be viewed in a second window to serve as a referance throughout this section. This can be done by clicking on the graphical parameters link using the middle mouse button. The following command extracts all the data for one of the species. Creates a bargraph.
Several options are available including verticle or horizontal bars and shading patterns.
Creates a pie chart from a vector of data. Creates a dot chart from a vector of data. A grouping variable, and a group summary may be used along with other options. Creates a histogram. Returns x and y coordinates of an estimate of the probability density of the data.