HP 49g+ - Manual (Page 380)

Page 12-3
return to normal calculator display. The PLOT SET UP window should
look similar to this:
• Note: You will notice that a new variable, called PPAR, shows up in
your soft menu key labels. This stands for Plot PARameters. To see its
contents, press
‚@PPAR. A detailed explanation of the contents of
PPAR is provided later in this Chapter. Press ƒ to drop this line
from the stack.
• Enter the PLOT environment by pressing „ñ(press them
simultaneously if in RPN mode). Press @ADD to get you into the
equation writer. You will be prompted to fill the right-hand side of an
equation Y1(x) = . Type the function to be plotted so that the
Equation Writer shows the following:
• Press ` to return to the PLOT SETUP window. The expression
‘Y1(X) = EXP(-X^2/2)/ √(2*π)’ will be highlighted. Press L@@@OK@@@ to
return to normal calculator display.
Note: Two new variables show up in your soft menu key labels, namely
EQ and Y1. To see the contents of EQ, use
‚@@@EQ@@. The content of EQ
is simply the function name ‘Y1(X)’. The variable EQ is used by the
calculator to store the equation, or equations, to plot.
To see the contents of Y1 press
‚@@@Y1@@. You will get the function Y1(X)
defined as the program: