resampling data into equal intervals

Question

C.G. 2022-2-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1649520-resampling-data-into-equal-intervals

评论： C.G. 2022-2-14

dataset.txt

I have a dataset (attached) which has been sampled at unequal intervals, but for processing I need to resample this to every second.

The timestamps for each data point are in column 1, and the data in column 2.

I have looked at the information on resample on matlab help, but i'm struggling to work out how to do this for my dataset. Can anybody help?

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Answer 1

Simon Chan 2022-2-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1649520-resampling-data-into-equal-intervals#answer_895720

在 MATLAB Online 中打开

dataset.txt

Try function retime

TT1=readtimetable('dataset.txt');
TT2 = retime(TT1,'secondly','linear');      % You may choose other method other than 'linear'
head(TT2,10)                                % Showing first 10 data
ans = 10×2 timetable
             Time                mass      tare
    _______________________    ________    ____

    2022-02-08 20:04:12.000     0.55425     0  
    2022-02-08 20:04:13.000     0.46354     0  
    2022-02-08 20:04:14.000     0.31349     0  
    2022-02-08 20:04:15.000     0.27578     0  
    2022-02-08 20:04:16.000     0.44176     0  
    2022-02-08 20:04:17.000    -0.56104     0  
    2022-02-08 20:04:18.000      1.1503     0  
    2022-02-08 20:04:19.000     0.76525     0  
    2022-02-08 20:04:20.000     0.37981     0  
    2022-02-08 20:04:21.000           0     0  