Hi Gaurav,
If you're using the C++ API, your C statement
dset = H5Dcreate(file, "dset1", H5T_NATIVE_DOUBLE, file_space, H5P_DEFAULT,
plist, H5P_DEFAULT);
would be something like this in C++:
H5::DataSet dset = file.createDataSet("dset1", PredType::NATIVE_DOUBLE,
data_space, plist);
You can find it here:
http://www.hdfgroup.org/HDF5/doc/cpplus_RM/classH5_1_1CommonFG.html#a12a4af21ca0231d4f2c4008b12177bb1
Is that what you're looking for?
?Binh-Minh
________________________________
From: Hdf-forum <[email protected]> on behalf of Gaurav
Bhalla <[email protected]>
Sent: Monday, May 05, 2014 11:04 AM
To: HDF Users Discussion List
Subject: Re: [Hdf-forum] Writing a string to an HDF5 file.
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]<mailto:[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]<mailto:[email protected]>]
On Behalf Of Gaurav Bhalla
Sent: Sunday, May 04, 2014 10:40 PM
To: [email protected]<mailto:[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?
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