[Paraview] Data range problem

Tue Oct 14 11:59:35 EDT 2008

Well if it has a header then I do not even need to check your file: raw binary 
is raw binary, no headers.

Dominik

On Tuesday 14 October 2008 05:28:56 pm you wrote:
> Hi Domink Sounds like I do't know what the Paraview definition of plain raw
> format is. I have attached the simple test file - just 3 points with a
> scalar value. It has a header section but paraview should recognise that
> anyway. Anything look odd in there? Thanks Lester> From:
> dominik at itis.ethz.ch> To: lester_anderson1963 at hotmail.com> Subject: Re:
> [Paraview] Data range problem> Date: Tue, 14 Oct 2008 08:25:22 +0200> CC:
> paraview at paraview.org> > 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>
> >> >> > _________________________________________________________________>
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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> >
> _________________________________________________________________> > Get
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> http://clk.atdmt.com/UKM/go/111354027/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
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-- 
Dominik Szczerba, Ph.D.
Computational Physics Group
Foundation for Research on Information Technologies in Society
http://www.itis.ethz.ch