Overview Of List, Data, And Matrix Variables - Texas Instruments TI-89 Manual Book

Overview of List, Data, and Matrix Variables

List Variable
Note: If you enter more than
one column of elements in a
list variable, it is converted
automatically into a data
variable.
Tip: After creating a list in
the Data/Matrix Editor, you
can use the list in any
application (such as the
Home screen).
Data Variable
Note: For stat calculations,
columns must have the
same length.
To use the Data/Matrix Editor effectively, you must understand
list, data, and matrix variables.
A list is a series of items (numbers, expressions, or character strings)
that may or may not be related. Each item is called an element. In the
Data/Matrix Editor, a list variable:
¦
Is shown as a single column of
elements, each in a separate cell.
¦
Must be continuous; blank or
empty cells are not allowed
within the list.
¦
Can have up to 999 elements.
On the Home screen (or anywhere else you can use a list), you can
enter a list as a series of elements enclosed in braces { } and
separated by commas.
Although you must use
commas to separate
elements on the entry
line, spaces separate the
elements in the history
area.
To refer to a specified
element in a list, use the
format shown to the
right.
A data variable is essentially a collection of lists that may or may not
be related. In the Data/Matrix Editor, a data variable:
¦
Can have up to 99
columns.
¦
Can have up to 999
elements in each
column. Depending on
the kind of data, all
columns may not have
to be the same length.
¦
Must have continuous columns; blank or empty cells are not
allowed within a column.
list1[1]
Element number
(or index number)
Name of list variable
Chapter 15: Data/Matrix Editor
Column title
and header
cells are not
saved as
part of the
list.
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