Hi,
On Sat, Apr 23, 2011 at 06:24:28PM +0200, Kraus Philipp wrote:
> I have written a std::string with this code into a HDF5 file:
Note that you write out the C-string obtained from the
std::string.
> H5::DataSet l_dataset;
> H5::DataSpace l_dataspace;
>
> // create group
>
> l_dataset.write( p_value.c_str(), H5::StrType(l_dataset),
> l_dataspace );
>
> p_value ist the std::string, which should be written. The l_dataset
> is an object with the datatype like NATIVE_CHAR.
>
> I write the data "abcd" into the file try reading them in matlab, I
> get in Matlab an array with [97, 98, 99, 100]. The array has the
> values of the chars a, b, c, d. How can I write a std::String with
> the HDF classes into a file?
Since your code is not complete (it's unclear how 'l_dataset'
gets set up) I can only guess that you don't write the trai-
ling '\0' character into the file. That belongs to a C-string
and without it it's just a char array (the '\0' indicates were
the string ends). And thus MatLab probably treats it as just
another array of values and not as a string. So I would start
with making sure that 'p_value.length( ) + 1' values get written
to the HDF5 file.
Regards, Jens
--
\ Jens Thoms Toerring ________ [email protected]
\_______________________________ http://toerring.de
_______________________________________________
Hdf-forum is for HDF software users discussion.
[email protected]
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
