[Paraview] Data range problem

Tue Oct 14 12:04:19 EDT 2008

I had a look at your file anyway. You confuse terms: you do not have any raw 
binary file but a plain ASCII text file. If you want to import data this way 
you have to read the vtk format description that is available as a technical 
document on the vtk web page - and modify your input file accordingly.

Dominik

On Tuesday 14 October 2008 05:59:35 pm Dominik Szczerba wrote:
> 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>>
> >
> > > > 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>
> >
> > >> >> > _________________________________________________________________
> > >> >> >>
> > >
> > > 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> >> >
> >
> > _________________________________________________________________> > 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> >
> > _________________________________________________________________> > 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