HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 95

variable, but one created by a previous exercise CASINFO a graph that provides CAS information MODULO Modulo for modular arithmetic (default = 13) REALASSUME List of variable names assumed as real values PERIOD Period for trigonometric functions (default = 2π) VX Name of default independent variable (default = X) EPS Value of small increment (epsilon), (default = 10-10) These variables are used for the operation of the CAS. Typing directory and variable names To name subdirectories, and sometimes, variables, you will have to type strings of letters at once, which may or may not be combined with numbers. Rather than pressing the ~, ~„, or ~, key combinations to type each letter, you can hold down the ~key and enter the various letter. You can also lock the alphabetic keyboard temporarily and enter a full name before unlocking it again. The following combinations of keystrokes will lock the alphabetic keyboard: ~~ locks the alphabetic keyboard in upper case. When locked in this fashion, pressing the „ before a letter key produces a lower case letter, while pressing the , key before a letter key produces a special character. If the alphabetic keyboard is already locked in upper case, to lock it in lower case, type, „~ ~~„~ locks the alphabetic keyboard in lower case. When locked in this fashion, pressing the „ before a letter key produces an upper case letter. To unlock lower case, press „~ To unlock the upper-case locked keyboard, press ~ Let's try some exercises typing directory/variable names in the stack. Assuming that the calculator is in the Algebraic mode of operation (although the instructions work as well in RPN mode), try the following keystroke sequences. With these commands we will be typing the words 'MATH', 'Math', and 'MatH' Page 2-37