HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 114

Using the history in Algebraic mode Here is a way to use the history (stack) to copy a variable from one directory to another with the calculator set to the Algebraic mode. Suppose that we are within the sub-directory {HOME MANS INTRO}, and want to copy the contents of variable z1 to sub-directory {HOME MANS}. Use the following procedure: ,@@z1@ K@@z1@ ` This simply stores the contents of z1 into itself (no change effected on z1). Next, use „§` to move to the {HOME MANS} sub-directory. The calculator screen will look like this: Next, use the delete key three times, to remove the last three lines in the display: ƒ ƒ ƒ. At this point, the stack is ready to execute the command ANS(1) z1. Press ` to execute this command. Then, use ,@@z1@, to verify the contents of the variable. Using the stack in RPN mode To demonstrate the use of the stack in RPN mode to copy a variable from one sub-directory to another, we assume you are within sub-directory {HOME MANS INTRO}, and that we will copy the contents of variable z1 into the HOME directory. Use the following procedure:,@@z1@ `³@@z1@ ` This procedure lists the contents and the name of the variable in the stack. The calculator screen will look like this: Now, use „§„§ to move to the HOME directory, and press K to complete the operation. Use ,@@z1@, to verify the contents of the variable. Copying two or more variables using the stack in Algebraic mode The following is an exercise to demonstrate how to copy two or more variables using the stack when the calculator is in Algebraic mode. Suppose, once more, that we are within sub-directory {HOME MANS INTRO} and that we want to copy the variables R and Q into sub-directory {HOME MANS}. The keystrokes necessary to complete this operation are shown following: ,@@ @R@@ K@@@R@@ ` Page 2-56