Texas Instruments TI-89 - Page 472

Appendix A: Functions and Instructions 455
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 455 of 132
Goto
CATALOG
Goto
labelName
Transfers program control to the label
labelName
.
labelName
must be defined in the same
program using a
Lbl
instruction.
Program segment:
©
:0
!
temp
:
1
!
i
:L
bl
TOP
: temp+i
!
temp
: If i<
1
0 T
h
en
: i+
1
!
i
: Goto TOP
: En
d
If
:Disp temp
©
Graph
CATALOG
Graph
expression1
[,
expression2
] [,
var1
] [,
var2
]
The
Smart Graph
feature graphs the requested
expressions/ functions using the current
graphing mode.
Expressions entered using the
Graph
or
Table
commands are assigned increasing function
numbers starting with 1. They can be
modified or individually deleted using the
edit functions available when the table is
displayed by pressing
† Header
. The
currently selected Y= functions are ignored.
If you omit an optional
var
argument,
Graph
uses the independent variable of the current
graphing mode.
Note: Not all optional arguments are valid in
all modes because you can never have all
four arguments at the same time.
In function graphing mode and
ZoomStd
window:
Graph 1.25a
ù
cos(a),a
¸
In parametric graphing mode and
ZoomStd
window:
Graph time,2cos(time)/time,time
¸
Some valid variations of this instruction are:
Function graphing
Graph
expr
,
x
Parametric graphing
Graph
xExpr
,
yExpr
,
t
Polar graphing
Graph
expr
,
q
Sequence graphing Not allowed.
3D graphing
Graph
expr
,
x
,
y
Diff Equations graphing Not allowed.
Note: Use
ClrGraph
to clear these functions,
or go to the Y= Editor to re-enable the system
Y= functions.
In 3D graphing mode:
Graph (v^2
ì
w^2)/4,v,w
¸