Texas Instruments TI-82 User Manual - Page 81
Using ZOOM MEMORY
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Using ZOOM MEMORY ZPrevious allows you to return to the WINDOW displayed prior to the previous ZOOM. ZoomSto stores the values of the current WINDOW variables to userdefined ZOOM MEMORY variables. ZoomRcl changes the WINDOW to the values stored with ZoomSto. ZOOM MEMORY Menu ZOOM MEMORY 1: ZPrevious 2: ZoomSto 3: ZoomRcl 4: SetFactors... Uses previous viewing WINDOW. Stores user-defined WINDOW. Recalls user-defined WINDOW. Changes Zoom In, Zoom Out factors. ZPrevious When you select ZPrevious from the ZOOM MEMORY menu, the graph is replotted using the WINDOW variables of the graph displayed prior to the previous ZOOM that you did. ZoomSto To store the current viewing WINDOW, select ZoomSto from the ZOOM MEMORY menu. The graph is displayed if necessary, and the values of the current WINDOW variables are stored in the user-defined ZOOM variables: ZXmin, ZXmax, ZXscl, ZYmin, ZYmax, and ZYscl. The action is immediate, there is no prompting on the display. These variables are global; they apply to all graphing modes. For example, changing the value of ZXmin in Func MODE also changes it in Par MODE. The user-defined WINDOW variables contain the standard values until you store to them the first time. ZoomRcl To view the selected graphing functions in the user-defined WINDOW, select ZoomRcl from the ZOOM MEMORY menu. The WINDOW variables are updated with the user-defined values, and the graph is plotted. Using ZOOM MEMORY from the Home Screen or a Program From the Home screen or a program, you can store directly to any of the user-defined ZOOM variables. From a program, you can select the ZoomSto or ZoomRcl instructions from the ZOOM MEMORY menu. Function Graphing 3-19