Texas Instruments TI-89 Guide Book

Appendix A: Functions and Instructions 421
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 421 of 132
ClrHome
CATALOG
ClrHome
Clears all items stored in the
entry()
and
ans()
Home screen history area. Does not clear the
current entry line.
While viewing the Home screen, you can
clear the history area by pressing
ƒ
and
selecting
8:Clear Home
.
For functions such as
solve()
that return
arbitrary constants or integers (@1, @2, etc.),
ClrHome
resets the suffix to 1.
ClrIO
CATALOG
ClrIO
Clears the Program I/O screen.
ClrTable
CATALOG
ClrTable
Clears all table values. Applies only to the
ASK
setting on the
Table Setup
dialog box.
While viewing the Table screen in
Ask
mode,
you can clear the values by pressing
ƒ
and
selecting 8:Clear Table.
colDim()
MATH/Matrix/Dimensions menu
colDim(
matrix
)
⇒
expression
Returns the number of columns contained in
matrix
.
Note: See also
rowDim()
.
colDim([0,1,2;3,4,5])
¸
3
colNorm()
MATH/Matrix/Norms menu
colNorm(
matrix
)
⇒
expression
Returns the maximum of the sums of the
absolute values of the elements in the
columns in
matrix
.
Note: Undefined matrix elements are not
allowed. See also
rowNorm()
.
[1,
ë
2,3;4,5,
ë
6]
!
mat
¸
[
1
ë
2 3
4 5
ë
6
]
co
l
Norm
(
mat
)
¸
9
comDenom()
MATH/Algebra menu
comDenom(
expression1
[
,var
]
)
⇒
expression
comDenom(
list1
[
,var
]
)
⇒
list
comDenom(
matrix1
[
,var
]
)
⇒
matrix
comDenom(
expression1
)
returns a reduced ratio
of a fully expanded numerator over a fully
expanded denominator.
comDenom((y^2+y)/(x+1)^2+y^2+y)
¸

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA