[Paraview] Data range problem

Tue Oct 14 02:25:22 EDT 2008

Hi, if you have tried all datatypes in Paraview then chances are very high 
your data is not plain raw format but includes some header etc. I don't have 
anything at hand in raw format but would be surprized there is none in VTK 
example data.
PS. I think some little programming might often help you out. You might want 
to look at python if you want to keep it at minimum (plus it integrates with 
VTK and PV).

Dominik

On Monday 13 October 2008 11:00:22 pm Lester Anderson wrote:
> Hi Dominik
>
> I do not have Matlab to test, but there should be no issue of "endianness"
> as I work on Windows and use PC-based editors. The file type does not seem
> to be the issue, but more the data within (just guessing).
>
> I have tried all the data type variants without success: other than being
> able to read the points in.
>
> Didn't seem to make much odds using xyzc (0 1 2 3) or (0.0 1.0 2.0 3.0)
>
> Do you have an example raw data file?  It would be so much more convenient
> to be able to load up data via CSV (but that currently doesn't work).
>
> What would be the best way of loading data into Paraview that does not
> require any programming or major work?
>
> Lester > From: dominik at itis.ethz.ch> To: lester_anderson1963 at hotmail.com>
> Subject: Re: [Paraview] Data range problem> Date: Mon, 13 Oct 2008 09:03:58
> +0200> CC: paraview at paraview.org> > A simple test you could do is to try to
> read the raw binary file into matlab. > there you can also specify both
> endianness and precision (double, int, etc.). > I bet the reason you do not
> get the right numbers is that you import a wrong > datatype.> > Dominik> >
> On Sunday 12 October 2008 11:54:36 pm Lester Anderson wrote:> > I have used
> a plain text editor to write a simple ascii structure, and also> > tried
> using Surfer (Golden Sofware) to prepare .DAT file do the same (eg> > space
> delimited or comma delimited). Basically I am testing a simple ascii> >
> text file structure and it ckearly loads the data (points plot where they>
> > should be), but it is unclear how to set the data type. If we are
> dealing> > with positive an negative numbers then I assume that means we
> need a signed> > integer or real number type.> >> > Perhaps if you could
> show an example data file that works in the raw import> > as an xyz,value
> it might be clearer as to how to proceed. Thanks for the> > help, I'm sure
> I'm missing something very obvious here just can't put my> > finger on it
> yet!> >> > Lester> From: dominik at itis.ethz.ch> To:
> lester_anderson1963 at hotmail.com>> > Subject: Re: [Paraview] Data range
> problem> Date: Sun, 12 Oct 2008 20:58:52> > +0200> CC:
> paraview at paraview.org> > How do you write the data to a file?> >> >
> Dominik> > On Sunday 12 October 2008 02:36:27 pm Lester Anderson wrote:> >>
> > Hi Dominik> >> > So how can I define the correct datatype? For example,
> if> > it is just signed> > integers like the test I made (-5 to +5), or
> real> > numbers (eg -2.54 to> > 5.55). I set the file to LittleEndian as
> I'm on a> > PC> >> > Importing the data via the raw format is working, it's
> just> > working out the> > correct type to make it work!> >> > Thanks for
> the help>> > >> > Lester > From: dominik at itis.ethz.ch> To:
> paraview at paraview.org>> > Subject:> > Re: [Paraview] Data range problem>
> Date: Sun, 12 Oct 2008> > 12:17:03 +0200>> > CC:
> lester_anderson1963 at hotmail.com> > You most likely> > imposed wrong> >
> datatype when importing the raw stuff.> > Dominik> > On> > Sunday 12
> October> > 2008 10:55:18 am Lester Anderson wrote:> > Hello> >> >> > I have
> just created> > a test as a set of random values:> >> >> >> >
> "x","y","z","grav"0,0,0,20,0,1,30,0,2,50,1,0,-10.1.1,-30,1,2,-50.2.0,10,2,1
>> >> >>> >> >
> >,20,2,2,51,0,0,-31,0,1,-41,0,2,-11,1,0,01.1.1,-21,1,2,21.2.0,11,2,1-11,2,2
>> >> >,0>
> >2,0,0,02,0,1-52,0,2,-42,1,0,-12.1.1,12,1,2,22.2.0,52,2,1,42,2,2,4>> > >>
> >> > It is a cube of point values (x,y,z) with a test scalar (grav). The> >
> data> >> > range of "grav" is -5 to +5> >> > I imported the data into> >
> Paraview as a> > raw(binary) format file which seemed> > ok, with the> >
> extents: 0 to 2 on> > (x,y,z). The result was a Image (uniform> >> >
> Rectilinear Grid)> >> > When I> > look at the data information it shows
> the> > data range as 2573, 13612> >> > (min,max) - what is going on here?>
> >> >> > Thanks> >> > Lester> >> >> >
> _________________________________________________________________> > Make>
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> http://clk.atdmt.com/UKM/go/111354029/direct/01/> > > > -- > Dominik> >> >
> Szczerba, Ph.D.> Computational Physics Group> Foundation for Research on>
> >> > Information Technologies in Society> http://www.itis.ethz.ch> >> >
> _________________________________________________________________> > Make
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> http://clk.atdmt.com/UKM/go/111354029/direct/01/> > > > -- > Dominik> >
> Szczerba, Ph.D.> Computational Physics Group> Foundation for Research on> >
> Information Technologies in Society> http://www.itis.ethz.ch> >
> _________________________________________________________________> > Make a
> mini you and download it into Windows Live Messenger> >
> http://clk.atdmt.com/UKM/go/111354029/direct/01/> > > > -- > Dominik
> Szczerba, Ph.D.> Computational Physics Group> Foundation for Research on
> Information Technologies in Society> http://www.itis.ethz.ch
> _________________________________________________________________
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-- 
Dominik Szczerba, Ph.D.
Computational Physics Group
Foundation for Research on Information Technologies in Society
http://www.itis.ethz.ch