User manual TEXAS INSTRUMENTS TI-NSPIRE HANDHELD

[. . . ] Math and Science Learning Technology Handheld Important Information Except as otherwise expressly stated in the License that accompanies a program, Texas Instruments makes no warranty, either express or implied, including but not limited to any implied warranties of merchantability and fitness for a particular purpose, regarding any programs or book materials and makes such materials available solely on an "as-is" basis. In no event shall Texas Instruments be liable to anyone for special, collateral, incidental, or consequential damages in connection with or arising out of the purchase or use of these materials, and the sole and exclusive liability of Texas Instruments, regardless of the form of action, shall not exceed the amount set forth in the license for the program. Moreover, Texas Instruments shall not be liable for any claim of any kind whatsoever against the use of these materials by any other party. FCC Statement Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. [. . . ] This syntax always refers to table cell A1--never to variable A1. Use this syntax: myvar A1 `A1 The shared variable A1. The apostrophe makes this a reference to variable A1--never to table cell A1. Brackets make this a reference to column A--never to variable A. A A[] Checking a variable's value using the Calculator application You can check the value of an existing variable by entering its name on the Calculator entry line. On the Calculator entry line, type the variable name num and press . The value most recently stored in num is displayed as the result. Using (linking) TI-NspireTM variables Sharing, or linking, the variables you create is a powerful tool for math exploration. The display of linked variables is automatically updated when the variable's value changes. In the following two examples, two data lists were created in Lists & Spreadsheet and then plotted in Graphs & Geometry. Working with Documents 49 When the values are altered in Lists & Spreadsheet, they automatically update in Graphs & Geometry. Linking to shared variables To use a stored variable: 1. Display the page and select the location or object to which you want to link a variable. Open the Tools menu and select the Variables option. Press and to scroll the list, or type part of the variable name. As you type, the TI-NspireTM system displays a list of variables that begin with the letters you typed. Typing part of the name enables you to locate a variable more quickly if the list is long. 50 Working with Documents 4. When you locate and highlight the name of the variable you want to use, click the name or press . The selected variable value is linked. Linking a Lists & Spreadsheet cell to a variable When you link a cell to a variable, Lists & Spreadsheet keeps the cell value updated to reflect the current value of the variable. The variable can be any variable in the current problem space and can be defined in Graphs & Geometry, Calculator, or any instance of Lists & Spreadsheet. System variables include ans, StatMatrix, and statistics results (such as RegEqn, dfError, and Resid). Click or / L, and click Cell. The VarLink menu displays. 3. Under Link To, scroll to the name of the variable and click it. The cell shows the value of the variable. Removing a linked variable To remove a linked variable from a page: 1. Do one of the following: Press h. Working with Documents 51 Press / L to display the Variables options. Open the Tools menu and select the Variables option. The Variables options display. 3. Select Unlink. The link is removed from the value, and the value is displayed without any bolding. Libraries A library is a TI-NspireTM document that contains a collection of variables, functions, and/or programs that have been defined as library objects. Unlike ordinary variables, functions, and programs, which can be used only within a single problem (the problem in which they are defined), library objects are accessible from any document. You can even create public library objects that appear in the TI-NspireTM Catalog. For details, see the "Libraries" chapter in Part 2 of the handheld guidebook, available on the CD that came with your handheld or on the Texas Instruments web site, http://education. ti. com. 52 Working with Documents Program Editor The Program Editor helps you define, edit, and manage user-defined functions and programs. The editor has dialog boxes to help you define functions and programs using correct syntax. [. . . ] When the tool is added, it will try to Data Collection 125 configure itself using the first available sensor. Any sensor that is already being controlled by a Data Collection tool is considered unavailable. Data Collection controls The Data Collection tool controls available are: Icon Name Start Data Collection Stop Data Collection Function Initiates data collection. The graph of existing data points is shown, and for motion experiments, velocity and acceleration data for the points are also available. If this button is selected when data collection is in progress, all data collection stops. [. . . ]