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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I am trying to integrate a scalar over a 3D volume. I was surprised to find that the Integrate Variables filter does not do this; when integrating a scalar variable of 1 over a cube of size 1 X 1 X 1, Integrate Variables returns the value of 6. The documentation says it will integrate over lines and surfaces only. Suggestions please.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Additional context: I am working with velocity field data, read in via the Ensight format. I have calculated vorticity, and vorticity magnitude, and I want the integral of the vorticity magnitude in a volume defined by an extracted subset.<o:p></o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal>-Jean <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>