Hi everyone,
I wanted to first store a tensor (symmetric, but yet 9 components; will
reduce this later) in an h5 format to be then read by paraview. The way
i did it was to calculate the 3X3 matrix at every point (from given data
) and then changed the shape(in python, using numpy arrays) to a 1X9
array, and then stored this in an h5 file (all using the h5py library of
python and numpy).
But when i try to read the file, although the grid appears correctly,
paraview says that it is unable to read the data:
ERROR: In
/home/pratik/Manually_Installed_Softwares/numerical/ParaView/ParaView-3.10.0/Utilities/Xdmf2/vtk/vtkXdmfHeavyData.cxx,
line 1102
vtkXdmfReader (0xaeee8a8): Failed to read attribute data
hmm..i do have the grid and the calculated tensor in different h5 files
(does that make a difference?). Can anyone please suggest what is wrong
with this? Is the format of storing the tensor data correct?
It is a 256X256 2dsmesh, so i gave:
<DataItem Format="HDF" NumberType="Float" Dimensions="256 256 9"
Precision="8">
in the xml file for the attribute of the tensor
here is the full xml file:
<?xml version="1.0" ?>
<!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" []>
<Xdmf>
<Domain Name="test.xdmf">
<Grid Name="Domain Space x Time" GridType="Collection"
CollectionType="Temporal">
<Time TimeType="List">
<DataItem Format="XML" NumberType="Float" Dimensions="1">
0.000000
</DataItem>
</Time>
<Grid Name="Time 1" GridType="Collection">
<Grid Name="Domain 1x1x1">
<Topology TopologyType="2DSMesh" Dimensions = "256 256">
</Topology>
<Geometry GeometryType="X_Y">
<DataItem Dimensions="256 256"
NumberType="Float" Precision="4" Format="HDF">
Rxdmf2d.h5:/X
</DataItem>
<DataItem Dimensions="256 256 "
NumberType="Float" Precision="4" Format="HDF">
Rxdmf2d.h5:/Y
</DataItem>
</Geometry>
<Attribute Name="sig" Center="Node"
AttributeType="Tensor">
<DataItem Format="HDF" NumberType="Float"
Dimensions="256 256 9" Precision="8">
Q.h5:/Q
</DataItem>
</Attribute>
</Grid>
</Grid>
</Grid>
</Domain>
</Xdmf>
--
*Pratik Mallya*
http://en.wikipedia.org/wiki/User:Pratik.mallya
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