PASCO Xplorer GLX, Руководство пользователя

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18 G r a p h
When you select a tool from the Tools menu
,
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a check mark ( ) appears next to
it. To turn off a tool, select it from the menu again, which removes the check
mark and returns the Graph to normal mode. If you have a tool turned on and you
choose a different tool, the previous tool will automatically turn off.
The options in the Tools menu are described below.
Smart Tool
When the Smart Tool is selected from the Tools menu, a pair of
crosshairs appears on the Graph with labels indicating its coordinates. Use the
left and right arrow keys to move the Smart Tool to adjacent data points. Use the
up and down arrow keys to send it to the first and last visible data points. Press
and hold the left or right arrow key to move the Smart Tool quickly.
If you have a mouse, you can move the Smart Tool by dragging the cir-
cle at the intersection of the cross hairs left and right.
Delta Tool
When the Delta Tool is selected from the Tools menu, a dashed rect-
angle appears on the Graph. One corner is marked with a circle, the other is
marked with a triangle. Labels on the edges of the Graph indicate the width (
∆
X)
and height (
∆
Y) of the rectangle, measured from the circle to the triangle.
When you first turn on the Delta Tool, the circle and triangle appear at the same
point. Press the left or right arrow a few times to separate them.
The left and right arrow keys move the triangle to adjacent data points; the up
and down arrow keys send the triangle to the first and last visible data points.
Press and hold the left or right arrow key to move the triangle quickly.
If you have a mouse, you can move the triangle by dragging it left or
right.
The triangle designates the active corner of the Delta Tool, which is the corner
that moves when you press the arrow keys or drag it with the mouse. To make the
other corner active, hold
and press . The triangle and circle will swap
places when you release both keys.
Note that when the cursors swap places, the signs of
∆
X and
∆
Y change. These
values are always measured from the circle to the triangle;
∆
X is the triangle’s X
coordinate minus the circle’s X coordinate,
∆
Y is the triangle’s Y coordinate
minus the circle’s Y coordinate. You would most typically be interested in the
values reported when the triangle is to the right of the circle.
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To select a tool from the Tools
menu:
Keypad
1. Press
t
o open the Tools menu.
2. Use the arrow keys to move the high-
light to the desired tool and press ;
or press the number on the keypad
corresponding to the desired tool.
Mouse
1. Click “Tools” at the bottom of the
screen to open the Tools menu.
2. Click the desired tool.
F3
The Tools menu
Coordinates
Smart Tool
Jump to
first point
Jump to
last point
Step right to
adjacent point
Step left to
adjacent point
D X D Y
Active
Corner
Stationary
Corner
Delta Tool
Esc
Õ