Dear Forum,

I encounter some conceptual problems, when trying to store incomplete columns 
for integer datatypes.



My issue refers to the problem expalined here:


http://stackoverflow.com/questions/33656043/hdf5-how-to-handle-empty-rows


Basically the author wants to store this table:


| time | x1  | y1   | x2 | y2 |

| 0       | 2.0 | 1.0 | 2.0 | 3.0 |

| 1       | 2.1 | 1.0 | 2.3 | 3.1 |

| 2       | 2.4 | 1.4 |        |       |

| 3       | 2.2 | 1.5 | 2.4 | 3.1 |

| 4       |       |       | 2.3  | 3.2 |


I tcontains incomplete columns of floating datatypes and can be solved by 
filling in NaNs.


For other datatypes, e.g. integer, there is no such NaN available. Is there 
some kind of textbook approach that decribes how to handle this problem?


Thanks,

Daniel
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