sh0sh1n
commented
5 years ago A practical reason why Datavyu on the Java side uses closed intervals for continuous coding (offset of a cell is 1 millisecond less than the onset of the following cell) is to seek to the appropriate frames when seeking to offsets. If the same timestamp were shared between the offset and onset of adjacent cells, seeking to the offset of the earlier cell would seek to the same frame as seeking to the onset of the later cell.
Current API functions do not specify whether cells are treated as closed intervals or half-closed intervals. Some functions, like merge_columns(), morph cell timestamps to simplify dealing with time intervals. In merge_columns()'s case, it changes point cells with equivalent onsets and offsets to cells with offsets one millisecond greater than its onset.
There ought to be a consensus or some way to specify how to treat time intervals.