title: What is the best structure in HDF5 for a sensor signal?
body: <p>I have a project in which I want to export measured sensor signals into a HDF5 file.</p>
  
  <p>The data I have consists of time,value pairs per sensor. The sensor data is sparse, meaning each sensor sends its data at different times and intervals. So there can be a sensor which sends data each second, as well as a sensor which sends data each minute. All data is 64 bit floating point for now.</p>
  
  <p>What is the best format for this? Should I create a Nx2 signal and store it in a group called sensors and store the timestamp and value next to eachother? Or should I create a group per sensor and store the values and timestamps in seperate arrays?</p>
  
  <p>I'm looking for best practices here. I would like to be able to plot the signals easily in python.</p>
  
  <p>In case anyone is wondering what I'm doing, this is the project in question: <a href="https://github.com/windelbouwman/lognplot" rel="nofollow noreferrer">https://github.com/windelbouwman/lognplot</a></p>