[Paraview] [EXTERNAL] Importing Vector (i.e., CSV text) files

[Zach]

I was able to properly load the file you posted and the values posted by
Scott. I am not certain why it did not work before, perhaps I did not have
the "Merge Consecutive Delimiters" selected, but thought for sure I had
toggled it.

It also seems that after playing around with the "Calculator" I am able to
load the vectors as expected. Still very new to PV.

So, it seems that the two of you have been helpful in remedying my
ignorance. Thanks.

Zach

On Fri, Feb 26, 2016 at 8:28 AM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> Can you attach a sample file that "does not work"? I tried spaces,
> multiple spaces, commas as separators and all worked just fine for me.
> I set the "Field Delimiter Characters" as a space (or comma) and also
> checked "Merge Consecutive Delimiters". Likewise, the sample file Alan
> included also loads for me.
>
> Note, a CSV file will simply be read in as a Table. If you want
> ParaView to interpret the x-coord, y-coord arrays as point
> coordinates, you have to apply the "Table to Points" filter and select
> which columns correspond to the coordinates. Similar to combine
> multiple columns into a vector, you have to apply the "Calculator"
> filter and use a function such as "iHat * scalar0 + jHat * scalar1".
>
> Attached state file and csv demonstrates how a file with 4 columns can
> be processed to read points and velocity vectors.
>
> Utkarsh
>
>
>
> On Fri, Feb 26, 2016 at 6:37 AM, Zach <zachnap at gmail.com> wrote:
> > I think there may be two spaces, but whitespace is whitespace. Not even
> > Excel gets confused by the spacing. I've tried the sample case above,
> but PV
> > still did not recognize the delimit.
> >
> > I have 4 columns:
> >
> > x-coord y-coord u-velocity v-velocity
> >
> > The x, y, z, scalar doesn't achieve what I want.
> >
> > I need something of the form:
> >
> > x-coord y-coord vector-direction scalar
> >
> > Thanks
> >
> > On Thu, Feb 25, 2016 at 9:55 PM, Scott, W Alan <wascott at sandia.gov>
> wrote:
> >>
> >> Just guessing here – you may have more spaces in the file than you
> think?
> >> Or, PV may be looking for a space, and you have two?  That’s the reason
> I
> >> recommend commas.
> >>
> >>
> >>
> >> Try this little toy problem that I use all the time:
> >>
> >>
> >>
> >> x-coord y-coord z-coord scalar
> >>
> >> 0 0 0 0
> >>
> >> 1 0 0 1
> >>
> >> 0 1 0 2
> >>
> >> 1 1 0 2
> >>
> >> -0.5 -0.5 1 4
> >>
> >> -0.5 -0.5 1 5
> >>
> >> -0.5 -0.5 1 6
> >>
> >> -0.5 -0.5 1 7
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> From: Zach [mailto:zachnap at gmail.com]
> >> Sent: Thursday, February 25, 2016 7:53 PM
> >> To: Scott, W Alan
> >> Cc: paraview at paraview.org
> >>
> >>
> >> Subject: Re: [EXTERNAL] [Paraview] Importing Vector (i.e., CSV text)
> files
> >>
> >>
> >>
> >> Alan,
> >>
> >>
> >> I have tried the " ", and it didn't have the effect I had hoped for.
> >>
> >> Yes, table to point makes points at the coordinates. I have vectors at
> >> certain pixel coordinates - processed PIV images. I have (x,y) location
> with
> >> a vector of velocity components (Ux, Uy) at those coordinates. The
> table to
> >> point seems to be wanting a scalar value at the location.
> >>
> >> Thanks
> >>
> >>
> >>
> >> Zach
> >>
> >>
> >>
> >> On Thu, Feb 25, 2016 at 7:02 PM, Scott, W Alan <wascott at sandia.gov>
> wrote:
> >>
> >> Zach,
> >>
> >>
> >>
> >> Please keep this reply on list, so we all get to learn (and I get to be
> >> corrected when I mess up).
> >>
> >>
> >>
> >> Try changing the Field Delimiter Characters string to be “ “
> >>
> >>
> >>
> >> Table to point makes points (or dots).  I don’t understand your comment
> >> about vectors.
> >>
> >>
> >>
> >> Alan
> >>
> >>
> >>
> >> From: Zach [mailto:zachnap at gmail.com]
> >> Sent: Thursday, February 25, 2016 4:26 PM
> >> To: Scott, W Alan
> >> Subject: Re: [EXTERNAL] [Paraview] Importing Vector (i.e., CSV text)
> files
> >>
> >>
> >>
> >> I saw the comma separation, but very inconvenient not to have whitespace
> >> delimit. That means I have to go through 30,000 files and change the
> format
> >> - sure it only requires writing a script to change, but white space
> delimit
> >> is a fairly basic standard.
> >>
> >> I have used the table to point filter, but I have vector data, the
> filter
> >> reads an X, Y, and Z value. I have x and y location and then Ux, and
> Uy. So,
> >> i have only been able to get dots at the x,y locations so far but no
> >> vectors.
> >>
> >> Thanks for the help.
> >>
> >> Zach
> >>
> >>
> >>
> >> On Tue, Feb 23, 2016 at 9:57 PM, Scott, W Alan <wascott at sandia.gov>
> wrote:
> >>
> >> I’m not sure if white space works – but comma’s do work.
> >>
> >>
> >>
> >> For instance, X, Y, Z, Var does work.
> >>
> >>
> >>
> >> Then, use the Table to Point filter.
> >>
> >>
> >>
> >> There is more information here:
> http://www.paraview.org/Wiki/Data_formats
> >>
> >>
> >>
> >> Does that answer the question?
> >>
> >>
> >>
> >> Alan
> >>
> >>
> >>
> >> From: ParaView [mailto:paraview-bounces at paraview.org] On Behalf Of Zach
> >> Sent: Tuesday, February 23, 2016 7:47 PM
> >> To: paraview at paraview.org
> >> Subject: [EXTERNAL] [Paraview] Importing Vector (i.e., CSV text) files
> >>
> >>
> >>
> >> Hello:
> >>
> >> I am trying to import vector files into Paraview which are really just
> csv
> >> text files delimited by whitespace. I am able to open the files, but
> they
> >> read in as a single column and I am unable to find the "delimit
> options" in
> >> any of the manuals or online materials.
> >>
> >> Do vector files need to be formatted with a particular scheme in order
> for
> >> Paraview to properly read them? Thanks
> >>
> >> Regards,
> >>
> >> Zach
> >>
> >>
> >>
> >>
> >
> >
> >
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Please keep messages on-topic and check the ParaView Wiki at:
> > http://paraview.org/Wiki/ParaView
> >
> > Search the list archives at: http://markmail.org/search/?q=ParaView
> >
> > Follow this link to subscribe/unsubscribe:
> > http://public.kitware.com/mailman/listinfo/paraview
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/paraview/attachments/20160226/6deb092f/attachment.html>