Texas Instruments TINSPIRE User Manual

436 Using Variables
Updating a variable
If you want to update a variable with the result of a calculation, you
must store the result explicitly.
Reusing the last answer
Each instance of Calculator automatically stores the last calculated result
as a variable named Ans. You can use Ans to create a chain of
calculations.
Note: Do not link to Ans or any system variable. Doing so could prevent
the variable from being updated by the system. System variables include
statistics results (such as Stat.RegEqn, Stat.dfError, and Stat.Resid) and
Finance Solver variables (such as tvm.n, tvm.pmt, and tvm.fv).
As an example of using Ans, calculate the area of a garden plot that is 1.7
meters by 4.2 meters. Then use the area to calculate the yield per square
meter if the plot produces a total of 147 tomatoes.
1. Calculate the area:
– On the Calculator entry line, type
1.7*4.2, and press Enter.
– Handheld: On the Calculator entry line, type 1.7 r 4.2, and press
·.
2. Reuse the last answer to calculate the yield per square meter:
– Type
147/ans, and press Enter to find the yield.
– Handheld: Type 147 p ans, and press · to find the yield.
Entry Result Comment
a := 2
2
a
3
8 Result not stored in variable a.
a
2
a := a
3
8Variable a updated with result.
a
8
a
2
& a
64 Variable a updated with result.
a
64

Texas Instruments TINSPIRE Specifications

General

Model	TI-Nspire
Resolution	320 x 240 pixels
Operating System	TI-Nspire OS
Display	LCD
Screen Size	3.2 inches
Color Depth	16-bit
Battery	4 AAA batteries
Connectivity	USB

Summary

TI-Nspire™ Navigator™ Teacher Software Guidebook

Setting up the TI-Nspire™ Navigator™ Teacher Software

Installing the handheld software

Ensures the latest operating system is installed on handhelds for proper software function and guides the installation process.

Creating and managing your teacher account

Explains how to create a teacher account in Teacher Preferences to log in to the TI-Nspire™ Navigator™ network from a handheld.

Logging in to the TI-Nspire™ Navigator™ system from the handheld

Guides users on how to log in to the TI-Nspire™ Navigator™ network from their handheld for system communication.

Getting started with the TI-Nspire™ Navigator™ Teacher Software

Using the Documents Workspace

Updating the handheld OS

Using the Class Workspace

Adding a class

Beginning and ending a class session

Guides users on starting, pausing, resuming, and ending a class session for communication with selected classes.

Using Live Presenter

Starting Live Presenter

Provides instructions on how to start Live Presenter by selecting a student or the teacher handheld.

Recording the live presentation

Guides users on how to record and save the live presentation as a movie file (.avi).

Using Question in the Teacher Software

Adding questions

Polling students

Opening the Quick Poll tool

Viewing poll results

Using the Scratchpad

Calculating with the Scratchpad

Details how to enter and evaluate math expressions, control result format, and use the Catalog for inserting functions and symbols.

Graphing with the Scratchpad

Guides users on how to graph functions, scatter plots, and sequences, including choosing graph types and using the entry line.

Calculator

Entering and evaluating math expressions

Details how to enter simple math expressions, control result format, and use the Catalog for inserting functions and symbols.

Calculator menu

Using Variables

Creating variables

Guides users on how any portion or attribute of an object or function can be stored as a variable.

Locking and unlocking variables

Graphs & Geometry

Graphs & Geometry menu

Using Lists & Spreadsheet

Creating and sharing spreadsheet data as lists

Plotting statistical data

Using Data & Statistics

Creating a normal probability plot

Creating a scatter plot

Programming

Overview of the Program Editor

Introduces the Program Editor for defining, editing, and managing user-defined functions and programs.

Defining a program or function

Guides users on starting a new program or function, defining names, types, and library access.

Data Collection and Analysis

Performing an experiment

Provides an overview of the typical process for performing an experiment, with brief steps and references to detailed sections.

Using advanced data collection options

Covers setting up offline sensors, remote collection units, and triggering for advanced data collection.

Using the TI-SmartView™ emulator

Opening the TI-SmartView™ emulator

Using Screen Capture