HP 49g Graphing Calculator - Manual (Page 103)

Cursor movement
With the plot screen displayed, you can move the cursor in one of two
ways:
® standard graphics mode
® trace mode.
Standard cursor movement
In standard graphics mode, the cursor moves independently of the plot.
That is, pressing ®, ®, ®, causes the cursor to move parallel to an
axis in the direction indicated by the key.
Tracing a plot
In trace mode, the cursor jumps from plotted point to plotted point along
the fimction when you press the @ or ® key. (The points that are plotted
depend on the step value set on the Plot Window input fonn.)
Where multiple functions have been plotted, pressing ® or ® moves the
cursor from function to fmiction.
Trace mode is available for function, polar, and parametric plots. To
activate trace mode, press
TRACE.
You would typically choose trace mode to determine the coordinates of
the points plotted (as explained in the next section). You can also display
plotted coordinates in tabular fonn. You do this by pressing 0 (iBLE) when
the plot is not displayed. See “Tables” on page 4-40 for more information.
Deactivate trace mode by pressing
trace
again. (Trace mode is
automatically deactivated if you choose a
zoom
fimction, or any other
fimction that causes the plot to be redrawn.)
Cursor coordinates
To display the coordinates of the cursor, press (F2) to select
(X,
y
).
The
menu is replaced by the coordinates of the cursor.
As you move the cursor, the coordinates of the cursor’s current position is
displayed. If you had turned on trace mode before pressing (£2), the
coordinates of consecutive plotted points are displayed as you press the
@ or ® key. (Plotted points are points that correspond to the values of
the independent variable as determined by the step value.)
Plotting graphs Page 4-35