HP 38g Graphing Calculator - Manual (Page 46)

To access an The {{APLET}} menu key in the VAR menu switches the menu
aplet variable ¡¡st to aplet variables. The ■ symbol indicates what is "on":
{{APLE b }} means that aplet variables are displayed.
1. Open the aplet whose variable you want to recall.
2. Press I VAR I to display the VAR menu. Set {{ apleb }}, if
necessary by pressing {{ aplet }}.
I^^FUNCTIBN
Plot ■ fixes
Connect
Coord
FastRes v
Plot FCN
Symbolic
Numeric v
3. Highlight the view on the left side. If you’je not sure which
view it’s in, just scroll through the view names and check
the names of the variables on the right.
4. Press {{OK}} or to switch to the list of variable names
on the right side.
5. Highlight the name of the variable you want. To copy its
name, turn on {{NAM»}}. To retrieve its value, turn on
{{ valub }}. Press {{OK}}.
You can do this in Home if the aplet you want is current; that
is, it was the last one open.
Symbolic Calculations
Formal Names
N o t e
A formal name acts as a placeholder—it does not represent a
value, just a symbol. In Home or in a program, the expression
(s 1 * s 2) ^ always returns the expression (s 1 * s 2) ^. The
real variables in { A*B) ^ on the pther hand, are evaluated to
a number, the value of which depends on what is currently
stored in A and B.
Remember that there is always a value in a real variable,
even if it is zero.
2-10 Mathematical Calculations