write flatten n-dimensional array

[aghaeifar]

Hi all

I store a flattened n-dimensional array within a 1D vector. Is it feasible to write this 1D vector as an n-dimensional array to an HDF5 file? I am hesitant to create a new n-dimensional array and duplicate the data, as this approach is not memory-efficient. when I attempt something like:

File file("create_dataset_example.h5", File::Truncate);
std::vector<size_t> dims{30, 100000, 1, 1};
DataSet dataset = file.createDataSet<float>("dset", DataSpace(dims));
dataset.write(my_1D_vector);

the program throws an exception:
what(): Impossible to write buffer of dimensions [ 30, 100000, 1, 1] into dataset with n = 1 dimensions.
Can anyone advice?
Thanks.

[aghaeifar]

Apparently there is a good example for this:
https://github.com/BlueBrain/HighFive/blob/master/src/examples/read_write_raw_ptr.cpp

[CsatiZoltan]

Thanks, it helped me with the same problem that you had!