Re: 1/0 - problem while rendering with lines

[Martin G. <mg...@in...>]

On 14.07.2007, at 16:15, Hans-Bernhard Br=C3=B6ker wrote:

> Martin Giersich wrote:
>
>> And i got rendering problems if i use data-clipping with lines and =20=

>> linespoint render mode
>> plot 'AGdata-test.dat' using 4:($3=3D=3D1?$5:1/0) with lines,\
>> 'AGdata-test.dat' using 8:($7=3D=3D1?$9:1/0) with lines,\
>> 'AGdata-test.dat' using 12:($11=3D=3D1?$13:1/0) with lines
>
> Guess you've just found out why 1/0 is not the recommended way of =20
> spelling out "no valid data", in gnuplot.  0/0, which is well and =20
> truly undefined instead of just being infinite, usually works better.

No change using 0/0. Same broken line drawing. I attached a plot- =20
output of th above plot-command.

This rendering problems appear using MacOSX 10.4.... and gnuplot 4.0, =20=

4.2, 4.3.

Btw, the official gnuplot-documentation (Thomas Williams & Colin =20
Kelley, "gnuplot - An Interactive Plotting Program", 3 March 2007, =20
available at: http://www.gnuplot.info/docs/gnuplot.pdf) describes at =20
page 25 using "1/0" as a way that "may be used to generate an =20
"undefined" flag, which
causes a point to ignored". No other method to do this is refered.
If there is another method to do this - besides change of dat-file =20
format - i'd like to know...

Regards,
Martin

----------------------------------------------------
Dipl.-Inf. Martin Giersich
Universit=C3=A4t Rostock
IEF - IFI - MMIS
www.informatik.uni-rostock.de/mmis

Fon: +49-381-498-7514
Fax: +49-381-498-7522

mar...@in...
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