Andy, <div><br></div><div>Today, I have tried again on 3.12.0. I don't know why but today both of the methods you mentioned work. </div><div><br></div><div>Thank you. </div><div><br></div><div>Makoto</div><div><br><br>
<div class="gmail_quote">2012/10/25 Andy Bauer <span dir="ltr"><<a href="mailto:andy.bauer@kitware.com" target="_blank">andy.bauer@kitware.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
What version of ParaView are you using? I was able to use "hstack([VelocityX, VelocityY, VelocityZ])" with the Python Calculator filter in v3.14.1. Alternatively you could try the Calculator filter with "iHat*VelocityX+jHat*VelocityY+kHat*VelocityZ".<br>
<br>Andy<br><br><div class="gmail_quote"><div><div class="h5">On Wed, Oct 24, 2012 at 12:17 PM, 中田拓馬 <span dir="ltr"><<a href="mailto:uirosan@gmail.com" target="_blank">uirosan@gmail.com</a>></span> wrote:<br></div>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
Dear all, <div><br></div><div>I am trying to compute vorticity from separated velocity vectors, but pre-installed filter of paraview seems to require 3-components vector as an input. Then, I have tried to use the "Python Calculator" filter to construct it. I put "hstack([VelocityX, VelocityY, VelocityZ])" into the "Expression" field following the wiki. However, it created just a copy of VelocityX instead of 3-components vector. How can I construct 3-components array form separated velocity vectors? </div>
<div><br></div><div>I have also tried to use the "Programmable Filter". But, it has been really difficult for me and I could not just extract the vector from the input. The vectors live in vtkUnstructuredGrid in a vtkMultiBlockDataSet and there are no function to extract Point Data form it. </div>
<div><br></div><div>Regards, </div><div><br></div><div>Makoto</div><div><br></div>
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