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Re: [netcdfgroup] [Hdf-forum] HDF Project for storing Time-Series storage of Physiological Waveforms - ECG etc

Scott
The timestamps are in dimension scales to the actual dataset. Dimension scales seem to be relatively unsupported... not by HDFView anyway. 

HDF Explorer supports dimension scales. To see an example, please go to

http://www.space-research.org/

go to  menu "Online help" and search "HDF5 Dimension scales"
The example shows maps generated for a dataset that has 2 sets of dimension scales attached. Choosing one set over the otther results in a different map. 

Direct link:

http://www.space-research.org/help/help.htm

more info

http://ftp.hdfgroup.org/HDF5/Tutor/h5dimscale.html



----------------------
Pedro Vicente
pedro.vicente@xxxxxxxxxxxxxxxxxx
http://www.space-research.org/
----- Original Message ----- From: "Mitchell, Scott - Exelis" <Scott.Mitchell@xxxxxxxxxxxxx> 
To: "HDF Users Discussion List" <hdf-forum@xxxxxxxxxxxxxxxxxx>
Sent: Thursday, April 09, 2015 10:05 AM
Subject: Re: [Hdf-forum] HDF Project for storing Time-Series storage of Physiological Waveforms - ECG etc
I do quite a bit of heterogeneous sensor data in time series. A common time format would be nice. I ended up using Windows .NET DateTime.Ticks. Users complained that it was unreadable (shocking) and I had to add a parallel text string. Some of the sensors provide their own timestamp typically in Unix Time (plus milliseconds).
The timestamps are in dimension scales to the actual dataset. Dimension scales seem to be relatively unsupported... not by HDFView anyway. So they end up as a secondary, independent dataset. It works in my code though. 


Scott

-----Original Message-----
From: Hdf-forum [mailto:hdf-forum-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Pierre de Buyl 
Sent: Wednesday, April 08, 2015 3:27 PM
To: hdf-forum@xxxxxxxxxxxxxxxxxx
Subject: Re: [Hdf-forum] HDF Project for storing Time-Series storage of Physiological Waveforms - ECG etc 

Hi Tim,
I was curious about the topic too. From memory (earlier searches, a few years ago), the was no standard for time series data. 

By googling today, I find a few results

TsTables
http://andyfiedler.com/projects/tstables-store-high-frequency-data-with-pytables/
it is aimed at financial data series and is based on Pandas and PyTables. So, it might no be very useful as a general purpose (i.e. usable by other software than Python).
Modelica Association Time Series File Format http://www.ep.liu.se/ecp/076/050/ecp12076050.pdf
Has been designed explicitly for generic time series data in the framework of https://modelica.org/ 

NSDF
http://nsdf.readthedocs.org/en/latest/nsdf.html
Neuroscience Simulation Data Format, it seems a bit simpler in its definition http://www.frontiersin.org/10.3389/conf.fninf.2014.18.00026/event_abstract 

It is just a bunch of links, but I hope that it helps.

Regards,

Pierre
On Wed, Apr 08, 2015 at 01:24:50PM +0000, Rajah, Tim (NIH/CC/SURG) [E] wrote: 
Hello Everyone,
I had posted earlier ago requesting any information on HDF based projects that were developed for Time-Series based storage of Physiological waveforms such as ECG etc. 

I would really appreciate your help in this matter.

Thanks
Tim



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