MATLAB: Extract start and end of a timerange

MATLABtimerangetimerange concatenationtimetable subscript

Working with timerange objects is great! One can keep a table in one piece and operate on subscripts of that table with a set of timeranges.

However … part of that workflow is to glue two adjacent timeranges together, which means extracting the start/end datetimes of a timerange, or implementing operations such as:

TR_AB = timerange(TR_A, TR_B); // which would take start of A, end of B and generate the AB timerange.

How can one achieve this?

Thanks

Best Answer

Andrei, you can't currently do that. You'd have to keep around the original endpoint values and create a new timerange.

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MATLAB: Access data within timerange

The timerange object is another of those opaque thingies TMW has fallen in love with that has useful stuff inside it that is hidden and not documented. :(

You can get the two interval values and the type of interval as two-step process--

s=timerange(t1,t2);
ss=struct(s);           % convert the timerange object to a struct that reveals internals
t1=ss.first;            % retrieve the start
t2=ss.last;             % end times in timerange s

However, since you have to have set t1,t2 for the timeranage object when you created it; it would be more straightforward to create your own "object" or array of objects that contains the information for the specific tmerange then. At the convenience of not having to carry those around but being able to reconstruct on demand for any specific timerange at hand.

MATLAB: Timerange in a loop

Yes. Build datetime objects using the three-input syntax and use them to construct a timerange. I left off one of the semicolons in the example below so you can see that at each iteration a different timerange was built with a different year.

for theyear = 2012:2016
    beginDate = datetime(theyear, 01, 01);
    endDate = datetime(theyear, 02, 01);
    TR = timerange(beginDate, endDate)
    % Do something with TR
end

Best Answer

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MATLAB: Access data within timerange

MATLAB: Timerange in a loop

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