Texas Instruments TI-Nspire CAS User Manual

count()
Catalog >
Within the Lists & Spreadsheet application,
you can use a range of cells in place of any
argument.
Empty (void) elements are ignored. For
more information on empty elements, see
page 232.
countif()
Catalog >
countif(List,Criteria) ⇒ value
Returns the accumulated count of all
elements in List that meet the specified
Criteria.
Criteria can be:
• A value, expression, or string. For
example, 3 counts only those elements in
List that simplify to the value 3.
• A Boolean expression containing the
symbol ? as a placeholder for each
element. For example, ?<5 counts only
those elements in List that are less than
5.
Within the Lists & Spreadsheet application,
you can use a range of cells in place of List.
Empty (void) elements in the list are
ignored. For more information on empty
elements, see page 232.
Note: See also sumIf(), page 176, and
frequency(), page 77.
Counts the number of elements equal to 3.
Counts the number of elements equal to
“def.”
Counts the number of elements equal to x;
this example assumes the variable x is
undefined.
Counts 1 and 3.
Counts 3, 5, and 7.
Counts 1, 3, 7, and 9.
Alphabetical Listing 39

Texas Instruments TI-Nspire CAS Specifications

General

Type	Graphing
Cover	-
Form factor	Pocket
Control type	Buttons, Touch
Product color	Grey, Silver
Digits	- digits
Display tilting	No
Display resolution	320 x 240 pixels
Display number of lines	- lines
Compatible operating systems	Windows XP/2000\\r Mac OS X 10.4/10.5
Battery type	AAA
Power source	Battery
Number of batteries supported	4
USB port	Yes
USB 2.0 ports quantity	1
RAM capacity	16 MB
ROM capacity	20 MB

Weight and Dimensions

Depth	198.3 mm
Width	100 mm
Height	28.7 mm