[. . . ] You can change the cursor to move to the next row (down) instead in the FORMATS dialog box. You can enter a real or complex value or an expression that resolves to a real or complex value. You can also enter symbolic data. Loading existing data You can load an existing matrix as all or part of the problem from within Simultaneous Equation Solver by using either of the following methods. Press „ 1:Augmented A|b, 2:Coefficient A, 3:Constant b, or 4:Two Matrices A and b. TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App Page 5 Editing coefficients 1. [. . . ] ¥ A, ¥ B, ¥ C, or ¥ D moves the cursor to the beginning or end of the row or column. Use the 2 ˆ (TI-89) or ˆ menu to insert a column or row, delete a column or row, or resize the matrix. Page 10 • • • • • • • • TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App • If the Split Screen mode is set to Top-Bottom when the application is started, the TI-89 automatically switches to Full; the TI-92 Plus / Voyage™ 200 PLT automatically places the application in the top portion. To see the solution displayed in RREF, press ‡ from the Solution screen. If another application is running, 2 a toggles between the applications. • • Right sides • • • To enter additional right sides (b 2 through b 5), use the cursor to move to those cells. To select a different right side to use in a calculation, use the 2 ‰ (TI-89) or ‰ menu. To store  additional right sides separately, use the … 3:Constant b command. TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App Page 11 FORMATS Dialog Box To display the FORMATS dialog box, press ƒ 9:Format or shortcut keys ¥ Í (TI-89) or ¥ F. Format settings Column Width: Sets the number of characters to display in each column. (Do not confuse this option with the MODE setting Display Digits, which determines the number of digits displayed. ) Cursor Movement: Determines whether the cursor moves to the next column (right) or next row (down) after data are entered. The default is Right. Answer in RREF: Sets the default Solution screen display mode when the system is solved the first time. The default is No. TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App Page 12 Show Residuals: Toggles display of the residual vector b-Ax, where x is the computed solution. When Show Residuals is set to YES, residuals are displayed in the column to the right of b 5 on the Coefficients screen. |resid| is the magnitude of the difference between the coefficient matrix times the computed solution and the right side. If this occurs, archive or delete some variables before returning to the application. When using a variable as input, verify that it is not a list, matrix, or other non-scalar expression. Choose a different variable that is scalar. Coefficient A and Constant b matrices do not have the same number of rows. Memory Element value must be a scalar or scalar expression. TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App Page 21 Message Existing variable SMLTDATA is preventing TISMLTEQ from saving its place. TISMLTEQ. simult is incompatible with cylindrical and spherical vector formats and with hex and bin bases. Tolerance value must be a nonnegative real number. Description This error message appears when the SMLTDATA variable is archived or locked. Change the vector format mode to rectangular and the base mode to DEC (decimal). LICENSE: Texas Instruments Incorporated (“TI”) grants you a license to use and copy the software program(s) (“License Materials”) contained on this diskette/CD/web site. You, and any subsequent user, may only use the Licensed Materials on Texas Instruments calculator products. RESTRICTIONS: You may not reverse-assemble or reverse-compile the Licensed Materials. COPYRIGHT: The Licensed Materials and any accompanying documentation are copyrighted. [. . . ] 8 Navigating Within Simultaneous Equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 FORMATS Dialog Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Example — Three Equations, Three Unknowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Example — Undefined Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]