Texas Instruments Titanium TI-89, User Manual

Page: 790 / 977

Appendix A: Functions and Instructions 787
dim()
MATH/Matrix/Dimensions menu
dim( list )
⇒
integer
Returns the dimension of
list
.
dim({0,1,2})
¸
3
dim(
matrix
)
⇒
list
Returns the dimensions of matrix as a two-element
list {rows, columns}.
dim([1,
ë
1,2;
ë
2,3,5])
¸
{2 3}
dim(
string
)
⇒
integer
Returns the number of characters contained in
character string
string
.
dim("Hello") ¸ 5
dim("Hello"&" there")
¸
11
Disp
CATALOG
Disp [
exprOrString1
] [ ,
exprOrString2
] ...
Displays the current contents of the Program I/O
screen. If one or more
exprOrString is specified, each
expression or character string is displayed on a
separate line of the Program I/O screen.
An expression can include conversion operations
such as
4
DD
and
4
Rect
. You can also use the
4
operator to perform unit and number base
conversions.
If
Pretty Print = ON
, expressions are displayed in
pretty print.
From the Program I/O screen, you can press
‡
to
display the Home screen, or a program can use
DispHome
.
Disp "Hello"
¸
Hello
Disp cos(2.3) ¸ ë .666…
{1,2,3,4}
!
L1
¸
Disp L1
¸
{1 2 3 4}
Disp 180_min
4
_hr
¸
3.
ø
_hr
Note: To type an underscore ( _ ), press:
@
¥ q
H 2 q
To type
4
, press
2
p
.
DispG
CATALOG
DispG
Displays the current contents of the Graph screen.
In function graphing mode:
Program segment:
©
:5
ù
cos(x)
!
y1(x)
: ë 10 ! xmin
:10 ! xmax
:
ë
5
!
ymin
:5
!
ymax
:DispG
©
DispHome
CATALOG
DispHome
Displays the current contents of the Home screen.
Program segment:
©
:Disp "The result is: ",xx
:Pause "Press Enter to quit"
:DispHome
:EndPrgm