Finding intervals of data from repeated time stamp/marks

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Systematically Neural 2018-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/424345-finding-intervals-of-data-from-repeated-time-stamp-marks

评论： jonas 2018-10-16

I have three sets of data times. They contain all the time stamps from a set of data, randomly divided into the three matrices (times_1,times_2, times_3). The recording took time stamps every .001 seconds. Much of these three matrices contain repeating time points, where consecutive .001 second time stamps are together. For those repeating or consecutive time points in each matrix, I would like to convert them into an interval style data point.

For example, if I have [43.5196, 43.5206, 43.5216,43.5226], I would like that to be converted into 43.5196-43.5226 or [43.5196, 43.5226].

Please let me know if there is any way to clarify this anymore!

Thanks for any help!

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dpb 2018-10-16

编辑：dpb 2018-10-16

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Well, after reading the other posting and this one again, you're trying to do something entirely different than what I thought your intent was -- the use of "repeated time" in the Q? title is a real red herring sending the respondent off in totally wrong direction....there are no repeated times at all so grouping by timestamp isn't what are trying to do at all.

accumarray may be more amenable to your task; the other Q? answer to find locations with breaks works.

>> ix=find(diff(t2)>0.001+eps(t2(1)));  % find breaks more than rounding error
>> length(t2)/length(ix)                % what's average length
ans =
    6.9783
>> ix(1:10)                             % where are first several
ans =
        1366
        3349
        4099
        4104
        4109
        4113
        4118
        4123
        4128
        4133
>>

OK, the first 1367 values are consecutive; so what do you want to do with them and what's the result to be? And where's whatever data goes with the timestamps?