160 Appendix A: Functions and Instructions
ClockOff CATALOG
ClockOff
Turns the clock OFF.
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.
To Next Page
Loading...
Need help?
General
