HP 50G, Руководство пользователя

Страница: 426 / 887

Page 12-43
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.