-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Werner,
thanks a lot, this should get me started! Best, Tim On 05/27/2014 05:09 PM, Werner Benger wrote: > Hi Tim, > > 1) you might want to use H5Literate() to find all members of a > group and to select the right one: > > http://www.hdfgroup.org/HDF5/doc/RM/RM_H5L.html#Link-Iterate > > Do you have multiple such groups? If so, you might need to > consider all of them or just one, if you can find a criteria. > > 2) and 3) seem to be application-specific questions which the > creator of the HDF5 file might know better. > > Best regards, > > Werner > > > > On 27.05.2014 16:00, Tim Gruene wrote: Hello, > > I am new to HDF5 and received sample neutron time-of-flight data > from the PCS. This machine has 8 detectors and each detects events > of the form (X, Y, t). > > I would like to access these triplets from a C-program. > > So far hdfview tells me that the top group is "run_515" containing > the groups "tof_detector_1" through "tof_detector_8". Each of > these 8 groups contains the data sets I am interested in, namely > "single_events_time", "single_events_x", and "single_events_y". > > I have a couple of questions w.r.t. to coding in C in order to > access these arrays. > > 1) while I assume that "tof_detector_1" etc. is always the same in > files from this machine, "run_515" seems to vary. I haven't > figured out how to access the data if I don't know the name > "run_515". Could someone point me into the right direction? > > 2) I received a sketch of the laytout of PCS and I guess that the > detectors are all planar. Should a proper HDF5-file contain the > orientations of each detector w.r.t. sample or some other mark, or > do I have to talk to the instrument scientist? > > 3) would a proper HDF5 file contain the distance from the 0-point > to the sample so that I know what distance the time t refers to? > > This would help me get started on HDF5. > > Best regards, Tim Gruene > > -- - -- Dr Tim Gruene Institut fuer anorganische Chemie > Tammannstr. 4 D-37077 Goettingen > > GPG Key ID = A46BEE1A > >> >> _______________________________________________ Hdf-forum is for >> HDF software users discussion. [email protected] >> http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org >> >> >> >> Twitter: https://twitter.com/hdf5 > - -- - -- Dr Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iD8DBQFThchpUxlJ7aRr7hoRAtK1AKDF+YGDgnCzyzYVVodxCcBkBmiCqACgqLjK kcJXP3EFPCz4j4FiOWpkEX8= =q51p -----END PGP SIGNATURE----- _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
