Hi,
you probably want a different datatype in the file than in memory,
i.e. in memory you want a datatype that describes the entire class, but
for the file type one that only refers to the components written.
Werner
On 22.07.2016 00:22, Aman Verma wrote:
I want to write, in a single line, the elements:
ObjectArray[i].Element (0<=i<n) without having to copy the elements
into a separate array altogether.
Using CompType and insertMember, I am writing just a subset (including
Element) of an array of a compound datatype ObjectArray (a
class/object in my case).
H5::CompTypemtype(sizeof(Class));
mtype.insertMember("MD", HOFFSET(Class, dMD), datatype);
H5::DataSetdataset = solution.createDataSet( "/Well", mtype,
dataspace, ds_creatplist );
dataset.write( ObjectArray, mtype );
This works fine. However, not unexpectedly, since I am defining the
CompType with the size of the whole class (Class), while writing out
only a subset (Element), my .h5 file is bigger (sizeof(Class)) than it
should be (sizeof(Element)). I am already using compression. Is there
a way to ‘delete’ this unused space? Or is there a better way to do
what I’m trying to achieve? Is using hyperslab the right answer?
Thanks
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___________________________________________________________________________
Dr. Werner Benger Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
2019 Digital Media Center, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362
_______________________________________________
Hdf-forum is for HDF software users discussion.
[email protected]
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Twitter: https://twitter.com/hdf5
