HP 49g+, Руководство пользователя, Страница: 422 / 862

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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:
•
Press
„ô
, simultaneously if in RPN mode, to access to the PLOT
SETUP window.
•
Change
TYPE
to
Function
, if needed
•
Change EQ to ‘X’
•
Make sure that Indep: is set to ‘X’ also
•
Press
L @@@OK@@@
to return to normal calculator display.
•
Press
„ò
, simultaneously if in RPN mode, to access the PLOT
window (in this case it will be called PLOT –POLAR window).
•
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@@@
.
•
Press
@ERASE @DRAW
to plot the function.
•
Press
@EDIT L @LABEL
to add labels to the graph. Press
LL
(or
„«
) to recover the original EDIT menu.
Next, we illustrate the use of the different drawing functions on the resulting
graphics screen. They require use of the cursor and the arrow keys
(
š™—˜
) to move the cursor about the graphics screen.
DOT+ and DOT-
When DOT+ is selected, pixels will be activated wherever the cursor moves
leaving behind a trace of the cursor position. When DOT- is selected, the
opposite effect occurs, i.e., as you move the cursor, pixels will be deleted.
For example, use the
™—
keys to move the cursor somewhere in the
middle of the first quadrant of the x-y plane, then press
@DOT+@@
. The label will
be selected (
DOT+ @
). Press and hold the
™
key to see a horizontal line being
traced. Now, press
@DOT-@
, to select this option (
@DOT- @
). Press and hold
the
š
key to see the line you just traced being erased. Press
@DOT-
, when
done, to deselect this option.