rvpplot
The rvpplot command is short for residual-versus-predictor plot and graphs the residuals against the values of the specified predictor variable. Some basic information about residuals can be found on Wikipedia. Additional information about the particulars of graphing residuals versus a predictor can be found here.
To use rvpplot simply type the word into the Command window, followed by what predictor you want to graph. You can only use independent variables with rvpplot though a number of basic plot options exist.