Texas Instruments TI-89 Titanium User Manual

770 Appendix A: Functions and Instructions
ClockOn CATALOG
ClockOn
Turns the clock ON .
ClrDraw CATALOG
ClrDraw
Clears the Graph screen and resets the Smart
Graph
feature so that the next time the Graph
screen is displayed, the graph will be redrawn.
While viewing the Graph screen, you can clear all
drawn items (such as lines and points) by pressing
† ( ReGraph ) or pressing:
@ 2ˆ
H ˆ
and selecting 1:ClrDraw .
ClrErr CATALOG
ClrErr
Clears the error status. It sets errornum to zero
and clears the internal error context variables.
The
Else clause of the Try...EndTry in the program
should use
ClrErr or PassErr . If the error is to be
processed or ignored, use
ClrErr . If what to do with
the error is not known, use
PassErr to send it to the
next error handler. If there are no more pending
Try...EndTry error handlers, the error dialog box
will be displayed as normal.
Note: See also
PassErr and Try .
Program listing:
:clearerr()
:Prgm
:PlotsOff:FnOff:ZoomStd
:For i,0,238
:@xù i+xmin! xcord
: Try
: PtOn xcord,ln(xcord)
: Else
: If errornum=800 or
errornum=260 Then
: ClrErr ¦ clear the error
: Else
: PassErr ¦ pass on any other
error
: EndIf
: EndTry
:EndFor
:EndPrgm
ClrGraph CATALOG
ClrGraph
Clears any functions or expressions that were
graphed with the
Graph command or were created
with the
Table command. (See Graph or Table .)
Any previously selected Y= functions will be
graphed the next time that the graph is displayed.

Texas Instruments TI-89 Titanium Specifications

General

Brand	Texas Instruments
Model	TI-89 Titanium
Category	Calculator
Language	English