Texas Instruments voyage 200 User Manual - Page 188

Menu Item NewProb Restore custom default Description Single-character variable names are often used in symbolic calculations such as: solve(a¦x2+b¦x+c=0,x) If any of the variables have already been assigned a value, your calculation may produce misleading results. To prevent this, you can select 1:Clear a-z before beginning the calculation. Places NewProb in the entry line. You must then press ¸ to execute the command. NewProb performs a variety of operations that let you begin a new problem from a cleared state without resetting the memory: • Clears all single-character variable names in the current folder (same as 1:Clear a-z), unless the variables are locked or archived. • Turns off all functions and stat plots (FnOff and PlotsOff) in the current graphing mode. • Performs ClrDraw, ClrErr, ClrGraph, ClrHome, ClrIO, and ClrTable. If a custom menu other than the default is in effect, this lets you restore the default. Refer to the Calculator Home Screen module for information on the custom menu. Notes: • When defining a variable that you want to retain, use more than one character in the name. This prevents it from being deleted inadvertently by 1:Clear a-z. • For information about checking and resetting memory or other system defaults, refer to Memory and Variable Management. Operating the Calculator 188