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16-30 Programming
Storing and retrieving variables in programs
The hp 39g+ has both Home variables and Aplet
variables. Home variables are used for real numbers,
complex numbers, graphics, lists, and matrices. Home
variables keep the same values in HOME and in aplets.
Aplet variables are those whose values depend on the
current aplet. The aplet variables are used in
programming to emulate the definitions and settings you
make when working with aplets interactively.
You use the Variable menu ( ) to retrieve either
Home variables or aplet variables. See “The VARS menu”
on page 12-4. Not all variables are available in every
aplet. S1fit–S5fit, for example, are only available in the
Statistics aplet. Under each variable name is a list of the
aplets where the variable can be used.
Plot-view variables
Area
Function
Contains the last value found by the Area function in Plot-
FCN menu.
Axes
All Aplets
Turns axes on or off.
From Plot Setup, check (or uncheck)
AXES.
or
In a program, type:
1
X Axes—to turn axes on (default).
0 X Axes—to turn axes off.
Connect
Function
Parametric
Polar
Solve
Statistics
Draws lines between successively plotted points.
From Plot Setup, check (or uncheck)
CONNECT.
or
In a program, type
1
X Connect—to connect plotted points (default,
except in Statistics where the default is off).
0
X Connect—not to connect plotted points.