Storing and retrieving variables in programs, Plot-view variables, Storing and retrieving variables in programs -30 – HP 39g Graphing Calculator User Manual

Page 238: Plot-view variables -30

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storing and retrieving variables in programs

The HP 39G/40G 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 (|

vars

])

to retrieve either Home

variables or aplet variables. See “The VARS menu” on
page 11-4. Not all variables are available in every aplet.
SlfiGSSfit, 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

The following aplet variables control the Plot view.

Area

Function

Axes

All Aplets

Connect

Function
Parametric

Polar
Solve
Statistics

Contains the last value found by the Area function in Plot-
FCN menu.

Turns axes on or off.

From Plot Setup, check (or uncheck) _AXES.

In a program, type:

1 ► Axes—to turn axes on (default).
0 ► Axes—to turn axes off.

Draws line.s between successively plotted points.

From Plot Setup, check (or uncheck) „CONNECT,

In a program, type

1 ► Connect—to connect plotted points (default,

except in Statistics where the default is off).

0 ► Connect—not to connect plotted points.

15-30

Programming