Divide timetable into 1s windows

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Shamus Sim
Shamus Sim on 12 Aug 2020
Commented: Steven Lord on 13 Aug 2020
I have a timetable (as attached: TT.mat) and would like to divide my data into 1s windows, where all the data from 0-0.99s is put into a new timetable. Data from 1-1.99s is placed in another timetable and so forth

Answers (1)

Steven Lord
Steven Lord on 12 Aug 2020
Rather than creating a whole bunch of small timetable arrays, could you instead use a timerange to select the appropriate subset of the rows of the timetable each time you need one of those "new" timetable arrays?
Or depending on what you want to do with the new arrays, perhaps some combination of retime, rowfun, and/or the various data preprocessing functions that accept timetable arrays (functions like groupsummary, movmean, etc.) would let you perform your operations on the various sections all at once.
Steven Lord
Steven Lord on 13 Aug 2020
Something like this?
peakPeriods = zeros(1, 600);
for p = 1:600
T = timerange(seconds(p-1), seconds(p), 'closed');
thisSecond = myTimetable(T, :);
% work on thisSecond
peakPeriods(p) = ... % or if peakPeriods is a matrix use (:, p) or (p, :)

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