Advanced Programming Guide

6.2 Programming with Plotting Library Functions • 219Every plotting procedure allows for optional arguments. You give theoptional information in the form name=option. Some of these optionsaffect the amount of information concerning the function that you give tothe plotting procedures. The grid option that the Mandelbrot set exampleuses is an instance of using an optional argument. You can use otheroptions for specifying visual information once you have determined thegraphical points. The type of axes, shading, surface style, line styles, andcoloring are a few of the options available in this category. For informationabout the options for the two-dimensional and three-dimensional cases,see the help pages ?plot,options and ?plot3d,options.Any graphics routine you create should allow users a similar set of options.When writing programs that call existing Maple graphics routines,simply pass the potential optional arguments directly to these routines.6.2 Programming with Plotting Library FunctionsThis section gives examples of programming with the graphics proceduresin Maple.Plotting a LoopConsider the first problem of plotting a loop from a list of data.> L1 := [ [5,29], [11,23], [11,36], [9,35] ];L1 := [[5, 29], [11, 23], [11, 36], [9, 35]]The plot command draws lines between the listed points.> plot( L1 );