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HP 39g, 39G+, 40g, and 40gs Calculators - Lists

Description
List operations can be done in programs and in HOME. A list consists of comma-separated real or complex numbers, equations, or matrices, all enclosed in braces. A list may, for example, contain a sequence of real numbers such as {1, 2, 3} (if the decimal mark in MODES is set to comma, then the separators are periods). Lists represent a convenient way to group related objects.
There are ten list variables available, named L0 to L9. These variables can be used in calculations or expressions in programs and in HOME. List names can be retrieved from the VARS menu or they can be accessed by typing their names with the keyboard.
Named lists can be created, edited, deleted, sent, and received in the LIST CATALOG (SHIFT, then LIST). Named and unnamed lists can also be created and stored in HOME.
Calculator symbol key
The procedures in this document use the following text to represent symbol keys:
Key
Description
Text Representation
Move cursor left
cursor-left
Move cursor right
cursor-right
Move cursor up
cursor-up
Move cursor down
cursor-down
Backspace/clear
backspace
Creating lists
List variables are identical in behavior to the columns C1.C0 in the statistics APLET. A statistics column can be stored to a list (or vice versa) and use any functions on the statistics columns or the statistics functions on the list variables.
Creating a list in the list catalog
To create a list in the list catalog:
  1. Open the LIST CATALOG by pressing SHIFT, then LIST
  2. Display the list editor by pressing EDIT, and highlight the list name that is to be used.
  3. Enter the desired values, pressing ENTER after each one (values can be real or complex numbers or expressions).
  4. When done, press SHIFT, then LIST to see the LIST CATLAOG, or press HOME to return home.
List catalog keys
The following table contains a list of the LIST CATALOG keys that are used for the HP 39 and 40g graphing calculators.
Key
Description
EDIT
Opens the highlighted list for editing
SEND
Transmits the highlighted list to another compatible calculator or PC
RECV
Receives a list from another compatible calculatoror PC
DEL
Clears the highlighted list
SHIFT, then CLEAR
Clears all lists
SHIFT, then cursor-up or cursor-down
Moves to the end or the beginning of the catalog
List edit keys
The table contains a list of the keys that are available when creating or changing a list with the 39g/40g graphing calculators.
Key
Description
EDIT
Copies the highlighted list item into the edit line
INS
Inserts a new value before the highlighted item
DEL
Deletes the highlighted item from the list
SHIFT, then CLEAR
Clears all elements from the list
SHIFT, then cursor-up or cursor -down
Moves to the end or the beginning of a list
Creating a list in HOME
To create a list in HOME:
  1. Enter the list in the edit line. Start and end the list with braces (the shifted 8 and 9 keys) and separate each element with a comma.
  2. Press ENTER to evaluate and display the list.
     note:
    Immediately after typing in the list, it can be stored in a variable by pressing STO+cursor-left, list name, and then ENTER. The list variable names are L0 through L9
Displaying and editing lists
Displaying lists
Lists can be displayed in one of two ways:
  • In the LIST CATALOG, highlight the list name and press EDIT
OR
  • In HOME, enter the name of the list and press ENTER
Displaying one element in a list
To display one element in a list:
  1. In HOME, enter listname(element#). For example, if L2 is {3, 4, 5, 6,} then press L2 (2)
  2. Press ENTER (pressing enter returns 4).
Editing lists
To edit a list:
  1. Open the LIST CATALOG by pressing SHIFT, then LIST
  2. Press the cursor-up or cursor-down keys to highlight the name of the list that is to be edited and press EDIT to display the list contents.
  3. Press the cursor-up or cursor-down keys to highlight the element that is to be edited.
  4. Press the DEL key to delete the current numbers or expressions, then enter the new value.
  5. Press OK
Inserting an element in a list
To insert an element in a list:
  1. Open the LIST CATALOG by pressing SHIFT, then LIST
  2. Press the cursor-up or cursor-down keys to highlight the name of the list that is to be edited and press EDIT to display the list contents.
  3. Press the cursor-up or cursor-down keys to access the place where the new element is to be inserted.
  4. Insert the new element.
  5. Press OK
Storing one element
To store one element:
  1. In home, enter value, STO+cursor-left or cursor-right key, listname(element). For example, 148, STO+cursor-left or cursor-right, L1 (2).
  2. Press ENTER
Deleting lists
To delete a list:
  1. In the LIST CATALOG (SHIFT, then LIST) highlight the list name and press DEL (the calculator will ask if the contents of the highlighted list variable are to be deleted).
  2. Press ENTER to delete the contents.
Deleting all lists
To delete all lists: in the LIST CATALOG press SHIFT, then CLEAR
Transmitting lists
Lists can be sent from one HP 39g/40g to another HP 39g/40g or from a 39g+/40gs to a 39g+/40gs graphing calculator just as APLETs, programs, matrices, and notes. To transmit a list:
  1. Align the calculators' infrared ports.
  2. Open the LIST CATALOGS on both calculators.
  3. Highlight the list that is to be sent and press SEND
  4. Press RECV on the receiving calculator.
     note:
    Lists can also be transmitted to or from a computer with the connectivity kit.

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