HP 40gs User Manual page 50

hp40g+.book Page 8 Friday, December 9, 2005 1:03 AM
Trace a graph
To move between
relations
2-8
Key Meaning (Continued)
Turns menu-key labels on and off.
When the labels are off, pressing
•
Pressing
full row of labels.
•
Pressing
removes the row of labels to
display only the graph.
•
Pressing
displays the coordinate mode.
Displays the ZOOM menu list.
Turns trace mode on/off. A white box
appears over the
Opens an input form for you to enter
an X (or T or N or θ) value. Enter the
value and press
to the point on the graph that you
entered.
Function aplet only: turns on menu list
for root-finding functions (see
"Analyse graph with FCN functions"
on page 3-4).
Displays the current, defining
expression. Press
menu.
You can trace along a function using the
which moves the cursor along the graph. The display also
shows the current coordinate position (x, y) of the cursor.
Trace mode and the coordinate display are automatically
set when a plot is drawn.
Note: Tracing might not appear to exactly follow your
plot if the resolution (in Plot Setup view) is set to Faster.
This is because RES: FASTER plots in only every other
column, whereas tracing always uses every column.
In Function and Sequence Aplets: You can also
scroll (move the cursor) left or right beyond the edge of
the display window in trace mode, giving you a view of
more of the plot.
If there is more than one relation displayed, press
to move between relations.
turns them back on.
once displays the
a second time
a third time
on .
. The cursor jumps
to restore the
or
Aplets and their views
key
or