This chapter introduces plotting on the HP-28S. Plotting is helpful in
itself, giving a visual understanding of how an expression or equation
behaves. In addition, plotting makes it easy to estimate the roots,
maxima, or minima of an expression. The next chapter, HThe Solver,"
shows how to use the Solver to turn estimates into precise numbers.
In this chapter you'll learn how to use some of the commands in the
PLOT menu. All commands in the PLOT menu are described briefly
in appendix D, HMenu Map.H For complete descriptions, refer to
HPLOT" in the Reference Manual.
For the first example you'll plot sin
in Radians angle mode, but first
there are preliminaries to make sure your display will match the
Plotting uses a variable named PPAR to store a list of plotting param-
eters. Purge any existing PPAR to ensure that the next plot uses the
default plotting parameters.
Clear the stack and select the PLOT menu .
Display the second row of the PLOT menu.