I tried both PV 4.10 and PV 4.31 and get the same result.
- extract surface
- connectivity
- threshold (defines the surface of the cylinder)

information shows ymax= 0.5, ymin=-0.5 which is correct as the radius of the 
circle is 0.5.
When I save data, the csv files has all of the y< 0 values. For y>0 most values 
are missing.
For the csv file, ymin= 0.5 but ymax = 0.24.

There are actually two circles, could this pose a problem?

I really need to solve this problem of missing values.
Give me ideas to try, alternative ways to write the data (how do I write only 
the values for the 1st cylinder to see if this is the problem?).
Thanks for your help,
Stephen


----- Original Message -----
> From: "Kenneth Moreland" <kmo...@sandia.gov>
> To: "Stephen Wornom" <stephen.wor...@inria.fr>, "ParaView list" 
> <paraview@paraview.org>
> Sent: Monday, March 9, 2015 6:28:45 PM
> Subject: Re: [Paraview] PV 4.1.0:  save the data saves only 1/2 of a circle
> 
> Stephen,
> 
> The CSV writer should write out all the points. I tried repeating your
> instructions with ParaView 4.3.1 using both the Cylinder source and the
> disk_out_ref dataset to write out data for a hollow cylinder source to a
> csv file and it looks like it works fine. I can only think of the most
> basic things to try:
> 
> * Are you sure your cylinder is centered in the x-y plane?  Maybe the
> circle is actually sitting below the y axis. Check that with either the
> cube axes or the information panel.
> * Is the connectivity/threshold filters really the best way to get a
> circle from a cylinder. You might consider instead to use the slice filter
> to get the circle. (I don't know why that would fix any I/O issues,
> though.)
> * Is there any chance you can try using the latest version of ParaView. I
> don't recall any such problems with the CSV reader in 4.1, but you never
> know.
> 
> -Ken
> 
> 
> 
> 
> On 3/9/15, 10:47 AM, "Stephen Wornom" <stephen.wor...@inria.fr> wrote:
> 
> >I have a cylinder ( a circle in the x-y plane, z is the span direction).
> >I do:
> >- extract surface
> >- connectivity
> >- threshold (defines the surface of the cylinder)
> >
> >The result is the circle shown in that attached figure.
> >
> >I want to write the circle values to a file so I save the data.
> >  The problem is that  PV4.10 saves only 1/2 half of the data (y<0). For
> >y> 0 only 4 points are written to the csv file, 124 points for y <0.
> >
> >How can I save the data so that all values are written?
> >Hope the question is clear.
> >Stephen
> >
> >--
> >stephen.wor...@inria.fr
> >2004 route des lucioles - BP93
> >Sophia Antipolis
> >06902 CEDEX
> >             
> >Tel: 04 92 38 50 54
> >Fax: 04 97 15 53 51
> >
> 
> 
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