hanks a lot for your note, I appreciate your help. One more follow up question, I guess I am just hoping that you may be able to help me. The issue is that I am basically writing the file from C++ and then processing it downstream in Python.
What would be the analogous statements in C++? I use this to create, dset = H5Dcreate(file, "dset1", H5T_NATIVE_DOUBLE, file_space, H5P_DEFAULT, plist, H5P_DEFAULT); I am guessing I should be able to somehow use the H5A function here also? On Mon, May 5, 2014 at 9:55 AM, Mitchell, Scott - Exelis < [email protected]> wrote: > There is no way to tag individual columns (i.e. fields in a compound > data type). And you certainly can't insert strings where doubles are > expected. What I've done is to tag the dataset with an H5A attribute (an > array of strings, one per field). In my case each string is the Unit > associated with the field. > > > > > > Scott > > > > *From:* Hdf-forum [mailto:[email protected]] *On > Behalf Of *Gaurav Bhalla > *Sent:* Sunday, May 04, 2014 10:40 PM > *To:* [email protected] > *Subject:* [Hdf-forum] Writing a string to an HDF5 file. > > > > I am trying to write an HDF5 file. The file basically contains a large > timeseries matrix in the following format > > > > TimeStamp Property1 Property2 > > I have managed to write the data successfully, I created a dset and used > the H5Dwrite function. > > Now my question is how do I create a file header, in other words, if I > want to write the following array to the file... > > ['TimeStamp', 'Property1', 'Property2'] > > ...and tag it to the columns for ease of later use ( I am planning to > analyze the matrix in Python). How to do that? > > I tried to use H5Dwrite to write a string array but failed, I guess it > wanted consistent datatypes, so it just wanted floats, which is the > datatype for my data. Then I read about this metadata thing, but I am a bit > lost as to how to use it? Any help would be much appreciated. > > A related side question is can the first row of a matrix be a string and > the others rows contain doubles? > > ------------------------------ > > This e-mail and any files transmitted with it may be proprietary and are > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this e-mail in error please notify the > sender. Please note that any views or opinions presented in this e-mail are > solely those of the author and do not necessarily represent those of Exelis > Inc. The recipient should check this e-mail and any attachments for the > presence of viruses. Exelis Inc. accepts no liability for any damage caused > by any virus transmitted by this e-mail. > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > [email protected] > > http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > >
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