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

[cédric o. <ced...@gm...>]

2013/10/1, Clement Law <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

I see dots where I expect.

> instead of using 'w l pal'
> Also, could you include the link which instructed you?

Here is the link:
http://stackoverflow.com/questions/15878211/pm3d-in-gnuplot-with-binary-data





>
>
> 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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>