EE Pro for TI - 89, 92 Plus
Analysis - Introduction to Analysis
9
2.6 Session Folders, Variable Names
EE•Pro automatically stores its variables in the current folder specified by the user in
3
or the HOME screens.
The current folder name is displayed in the lower left corner of the screen (default is “Main”). To create a new
folder to store values for a particular session of EE•Pro, press
ƒ
:/TOOLS,
ª
:/NEW
and type the name of the
new folder (see Chapter 5 of the TI-89 Guidebook for the complete details of creating and managing folders).
There are several ways to display or recall a value:
•
The contents of variables in any folder can be displayed using the
°
, moving the cursor to the
variable name and pressing
ˆ
to display the contents of a particular variable.
•
Variables in a current folder can be recalled in the HOME screen by typing the variable name.
•
Finally, values and units can be copied and recalled using the
ƒ
/Tools
5:COPY
and
6:PASTE
feature.
All inputs and calculated results from Analysis and Equations section are saved as variable names. Previously
calculated, or entered values for variables in a folder are replaced when equations are solved using new values for
inputs.
Overwriting of variable values in graphing
When an equation or analysis function is graphed, EE•Pro creates a function for the TI grapher which expresses
the dependent variable in terms of the independent variable. This function is stored under the variable name
pro(x). When the EE•Pro’s equation grapher is executed, values are inserted into the independent variable for
pro(x) and values for the dependent value are calculated. Whatever values which previously existed in either of
the dependent and independent variables in the current folder are cleared. To preserve data under variable
names which may conflict with EE•Pro’s variables, run EE•Pro in a separate folder.
Reserved Variables
There is a list of reserved variable names used by the TI operating system which cannot be used as user variable
names or entries. These reserved variables are listed in Appendix F.