[Paraview] Data range problem

Tue Oct 14 11:28:56 EDT 2008

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> >> >> > 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 all your favourite content with the slick new MSN Toolbar - FREE> > 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
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