Re: TIB: Clearing part of the graph screen


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Re: TIB: Clearing part of the graph screen




Adding the '0' to the end is what the manual says to do, but it is
wrong.  Use 'cldrw'.  For some reason TI eliminated the feature of
adding a zero to the line command to erase it, but they left it in the
manual.

The Kellers wrote:
> 
> I just bought a TI-86, so this is probably a dumb question. I was wondering
> how to erase a line drawn on the graph from inside a program. I tried
> "Line(x1,y1,x2,y2,0)" like it said in the manual. But that just gave me an
> error.
> 
>  Also, is there any faster way to clear part of the screen than Text( with a
> lot of spaces or PixelOff?
> 
>  And one more question, is there any way to detect if a variable exists from
> inside a program?
> 
> Any help apreciated,
> Philipp


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