how to create a timetable from a datetime array and a matrix?

Question

Doheon Lee 2021-7-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/879498-how-to-create-a-timetable-from-a-datetime-array-and-a-matrix

评论： Walter Roberson 2021-7-17

I like to create a timetable from a datetime array and a matrix.

d = datetime('2021-01-01'):caldays(1):datetime('2021-01-10');
m = rand(10,5);
t = timetable(d', m)

The resulting table is as blow.

       Time                                   m                           
    ___________    _______________________________________________________
    01-Jan-2021    0.95929     0.34998     0.28584     0.12991     0.60198
    02-Jan-2021    0.54722      0.1966      0.7572     0.56882     0.26297
    03-Jan-2021    0.13862     0.25108     0.75373     0.46939     0.65408
    04-Jan-2021    0.14929     0.61604     0.38045    0.011902     0.68921
    05-Jan-2021    0.25751     0.47329     0.56782     0.33712     0.74815
    06-Jan-2021    0.84072     0.35166    0.075854     0.16218     0.45054
    07-Jan-2021    0.25428     0.83083     0.05395     0.79428    0.083821
    08-Jan-2021    0.81428     0.58526      0.5308     0.31122     0.22898
    09-Jan-2021    0.24352     0.54972     0.77917     0.52853     0.91334
    10-Jan-2021    0.92926     0.91719     0.93401     0.16565     0.15238
    

But, I like to create the resulting table with 5 columns as below.

    
       Time            A          B           C           D          E      
    ___________    _______________________________________________________
    01-Jan-2021    0.95929     0.34998     0.28584     0.12991     0.60198
    02-Jan-2021    0.54722      0.1966      0.7572     0.56882     0.26297
    03-Jan-2021    0.13862     0.25108     0.75373     0.46939     0.65408
    04-Jan-2021    0.14929     0.61604     0.38045    0.011902     0.68921
    05-Jan-2021    0.25751     0.47329     0.56782     0.33712     0.74815
    06-Jan-2021    0.84072     0.35166    0.075854     0.16218     0.45054
    07-Jan-2021    0.25428     0.83083     0.05395     0.79428    0.083821
    08-Jan-2021    0.81428     0.58526      0.5308     0.31122     0.22898
    09-Jan-2021    0.24352     0.54972     0.77917     0.52853     0.91334
    10-Jan-2021    0.92926     0.91719     0.93401     0.16565     0.15238

So I tried the following code to give different names to each column, but it does not work.

t.Properties.VariableNames = {'A', 'B', 'C', 'D', 'E'}

Thank you very much for the help in advance.

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Answer 1

Walter Roberson 2021-7-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/879498-how-to-create-a-timetable-from-a-datetime-array-and-a-matrix#answer_747653

编辑：Walter Roberson 2021-7-15

在 MATLAB Online 中打开

d = datetime('2021-01-01'):caldays(1):datetime('2021-01-10');
m = rand(10,5);
t = array2table(m, 'VariableNames', {'A', 'B', 'C', 'D', 'E'})
t = 10×5 table
       A           B            C           D           E   
    ________    ________    _________    ________    _______

     0.98979     0.91374       0.2907     0.16664    0.85502
    0.037379     0.19918      0.45673     0.96181    0.55476
     0.16478     0.66507      0.72775     0.66474    0.44108
     0.96658     0.74907     0.096927     0.34676    0.32186
     0.33786    0.033472      0.94875     0.84561    0.43635
     0.62363     0.82431      0.50066     0.99156    0.50445
     0.76383     0.24839      0.37759     0.31366    0.54562
     0.26933     0.50286      0.98601    0.020343    0.39307
     0.53943     0.27297      0.47952     0.30908    0.33387
     0.38275     0.31086    0.0038893     0.29516    0.34232
tt = table2timetable(t, 'RowTimes', d.')
tt = 10×5 timetable
       Time           A           B            C           D           E   
    ___________    ________    ________    _________    ________    _______

    01-Jan-2021     0.98979     0.91374       0.2907     0.16664    0.85502
    02-Jan-2021    0.037379     0.19918      0.45673     0.96181    0.55476
    03-Jan-2021     0.16478     0.66507      0.72775     0.66474    0.44108
    04-Jan-2021     0.96658     0.74907     0.096927     0.34676    0.32186
    05-Jan-2021     0.33786    0.033472      0.94875     0.84561    0.43635
    06-Jan-2021     0.62363     0.82431      0.50066     0.99156    0.50445
    07-Jan-2021     0.76383     0.24839      0.37759     0.31366    0.54562
    08-Jan-2021     0.26933     0.50286      0.98601    0.020343    0.39307
    09-Jan-2021     0.53943     0.27297      0.47952     0.30908    0.33387
    10-Jan-2021     0.38275     0.31086    0.0038893     0.29516    0.34232

.... or

t = timetable('RowTimes', d.')

t = 10×0 empty timetable

t.A = m(:,1); t.B = m(:,2); t.C = m(:,3); t.D = m(:,4); t.E = m(:,5);

t

t = 10×5 timetable

Time A B C D E ___________ ________ ________ _________ ________ _______ 01-Jan-2021 0.98979 0.91374 0.2907 0.16664 0.85502 02-Jan-2021 0.037379 0.19918 0.45673 0.96181 0.55476 03-Jan-2021 0.16478 0.66507 0.72775 0.66474 0.44108 04-Jan-2021 0.96658 0.74907 0.096927 0.34676 0.32186 05-Jan-2021 0.33786 0.033472 0.94875 0.84561 0.43635 06-Jan-2021 0.62363 0.82431 0.50066 0.99156 0.50445 07-Jan-2021 0.76383 0.24839 0.37759 0.31366 0.54562 08-Jan-2021 0.26933 0.50286 0.98601 0.020343 0.39307 09-Jan-2021 0.53943 0.27297 0.47952 0.30908 0.33387 10-Jan-2021 0.38275 0.31086 0.0038893 0.29516 0.34232

.... or

t = [timetable('RowTimes', d.'), array2table(m, 'VariableNames', {'A', 'B', 'C', 'D', 'E'})]
t = 10×5 timetable
       Time           A           B            C           D           E   
    ___________    ________    ________    _________    ________    _______

    01-Jan-2021     0.98979     0.91374       0.2907     0.16664    0.85502
    02-Jan-2021    0.037379     0.19918      0.45673     0.96181    0.55476
    03-Jan-2021     0.16478     0.66507      0.72775     0.66474    0.44108
    04-Jan-2021     0.96658     0.74907     0.096927     0.34676    0.32186
    05-Jan-2021     0.33786    0.033472      0.94875     0.84561    0.43635
    06-Jan-2021     0.62363     0.82431      0.50066     0.99156    0.50445
    07-Jan-2021     0.76383     0.24839      0.37759     0.31366    0.54562
    08-Jan-2021     0.26933     0.50286      0.98601    0.020343    0.39307
    09-Jan-2021     0.53943     0.27297      0.47952     0.30908    0.33387
    10-Jan-2021     0.38275     0.31086    0.0038893     0.29516    0.34232