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554 Programming
User variables are variables created by the user or
exported from a user program. They provide one of
several mechanisms to allow programs to communicate
with the rest of the calculator, and with other programs.
Once a variable has been exported from a program, it
will appear among the User variables in the Variables
menu, next to the program that exported it.
This chapter deals with App variables and User variables.
For information on Home and CAS variables, see chapter
22, “Variables”, beginning on page 427.
App
variables
Not all app variables are used in every app. S1Fit, for
example, is only used in the Statistics 2Var app. However,
most of the variables are used in common by the Function
app, the Parametric app, the Polar app, the Sequence
app, the Solve app, the Statistics 1Var app, the Statistics
2Var app, and others. If a variable is not available in all
of these apps, or is available only in some other apps,
then a list of the apps where the variable can be used
appears under the variable name.
The following sections list the app variables by the view in
which they are used. To see the variables listed by the
menus in which they appears on the Variables menu see
“App variables”, beginning on page 432.
Plot view variables
Axes Turns axes on or off.
In Plot Setup view, check (or uncheck) AXES.
In a program, type:
0
Axes—to turn axes on.
1
Axes—to turn axes off.
Cursor Sets the type of cursor. (Inverted or blinking is useful if the
background is solid).
In Plot Setup view, choose Cursor.