If you have an ascii file that only have a few digits in the numbers (~7 significant digits), you are better off using single precision (float array) which is 4 bytes.
On Thu, Jul 26, 2012 at 11:11 AM, David E DeMarle <[email protected]>wrote: > On Thu, Jul 26, 2012 at 5:42 AM, Zenker, Dr. Matthias > <[email protected]> wrote: > > Hi, > > > > I need to convert legacy vtk files to vtr files. The vtk files are in > ASCII > > format and approx. 17 MB large. When I use binary or ASCII as data mode, > I > > get a file size of approx. 28 MB. When I use appended data mode without > > encoding, it’s 20 MB. When I use encoding with ZLib compressor (there is > > only this one), the shinks to approx. 800 kB! Also data access is a lot > > faster when I load that file in ParaView. > > My questions: > > > > > > Why does the file grow for most of the modes I have tried? > > Each double in the binary file is 8 bytes. In ascii, the size depends > on the number of characters, which can be more or less than that. On > my machine I see the same counterintuitive result, the binary is > larger. > > > Is the ZLib compression used in ParaView lossless, or do I lose > information > > when I apply it? > > lossless. > > > > > > > Thanks for some explanations… > > > > Matthias > > > > > > > > _____________________________________________________________________ > > ERBE Elektromedizin GmbH > > Firmensitz: 72072 Tuebingen > > Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede > > Registergericht: Stuttgart HRB 380137 > > > > > > _______________________________________________ > > 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 > > > > Follow this link to subscribe/unsubscribe: > > http://www.paraview.org/mailman/listinfo/paraview > > > _______________________________________________ > 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 > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview >
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