HP 49g Graphing Calculator - Manual (Page 96)

The following diagram is of the same plot as in the previous illustration,
but the axes now meet where x =1 and y =1.
Plotting programs
You can plot a program if it takes nothing from the stack, uses the
independent variable in the program, and returns exactly one mrtagged
number to the stack.
Examples
® Real result. Equivalent to the expressions/(,x) (function plots) and
'r(6) (polar plots). For example, the program:
« IF ' X < 0 ' THEN ' 3 * X ' ' 3 - 4 5 X " ' 2 + 3 5 0 ' ELSE 1 0 0 0 E N D »
plots/(x) = 3,x^-45x^+350 if x<0 and/(x) = 1000 if ,x>0.
Store the program in EQ, select autoscaling, and draw the plot.
® Complex result. Equivalent to (x(i), i/(0) (parametric plots). For
example, the program:
« ' t ^ 2 - 2 ' ^ N U M ' t " 3 - 2 t + l ' ->NUM R^C »
plots the parametric equations x = t^-2 and x =
Store the program in EQ, make f the independent variable, select
autoscaling, and draw the plot.
Advanced plotting options Page 10-3