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Interactive drawing
Whenever we produce a two-dimensional graph, we find in the graphics screen
a soft menu key labeled @)EDIT. Pressing @)EDIT produces a menu that include the
following options (press L to see additional functions):
Through the examples above, you have the opportunity to try out functions
LABEL, MENU, PICT, and REPL. Many of the remaining functions, such as
DOT+, DOT-, LINE, BOX, CIRCL, MARK, DEL, etc., can be used to draw points,
lines, circles, etc. on the graphics screen, as described below. To see how to
use these functions we will try the following exercise:
First, we get the graphics screen corresponding to the following instructions:
Θ Press „ô, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
Θ Change
TYPE to Function, if needed
Θ Change EQ to ‘X’
Θ Make sure that Indep: is set to ‘X’ also
Θ Press L@@@OK@@@ to return to normal calculator display.
Θ Press „ò, simultaneously if in RPN mode, to access the PLOT
window (in this case it will be called PLOT –POLAR window).
Θ Change the H-VIEW range to –10 to 10, by using 10\@@@OK@@@
10@@@OK@@@, and the V-VIEW range to -5 to 5 by using
5\@@@OK@@@ 5@@@OK@@@.
Θ Press @ERASE @DRAW to plot the function.
Θ Press @EDIT L @LABEL to add labels to the graph. Press LL (or
„«) to recover the original EDIT menu.