Re: [Gnuplot-info] unexpected difference between plot and splot of binary files with unstructured data

[Clement L. <the...@gm...>]

Out of interest, what happens when you execute:

plot 'file.dat' binary record=(15,-1) format='%float' u 1:2:3 w d pal

instead of using 'w l pal'

Also, could you include the link which instructed you?


On 30 September 2013 13:29, cédric ody <ced...@gm...> wrote:

> In fact and to be more complete, this behaviour for splot is obtained
> with gnuplot 4.6 patchlevel 0.
>
> Crossing lines are also observed for splot AND plot command on the
> older version 4.2 patchlevel 2. So it is seems there have been
> progress between the two versions for the plot command.
>
> Cédric
>
>
>
> 2013/9/30, cédric ody <ced...@gm...>:
> > Hi,
> >
> > I have found a interesting comment on the web explaining how to plot
> > unstructured mesh written in a binary file in gnuplot. I knew to do
> > that in ascii but I have been looking for the binary possibility for a
> > while.
> >
> > The command is for instance the following
> >
> > plot 'file.dat' binary record=(15,-1) format='%float' u 1:2:3 w l palette
> >
> > I wrote the binary file file.dat using octave (fwrite(file,vector)).
> >
> > The 15 is because I plot cells of 5 points of two coordinates + the
> > value at the point.
> >
> > cell=[ptA ptB ptC ptD ptA]
> >
> > vector=[ptAx ptAy ptAval ptBx ptBy ptBval ptCx ptCy ptCval  ptDx ptDy
> > ptDval  ptAx ptAy ptAval ...];
> >
> > The plot command gives expected results (I would expect that I have
> > used an ascii filename). However, the splot command does not as some
> > cells of the unstructured mesh are now connected although they should
> > not.
> >
> > Does anybody know what I am missing.
> >
> > Thank you very much,
> >
> > Cédric
> >
>
>
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