Create a matrix with columns of both datetime and double format

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David E.S. 2021-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/819285-create-a-matrix-with-columns-of-both-datetime-and-double-format

评论： Steven Lord 2021-5-2

I want to create a matrix with these vectors:

a = [21-Mar-2021 07:44
    21-Mar-2021 17:35
    22-Mar-2021 07:48
    22-Mar-2021 17:46
    23-Mar-2021 07:49
    23-Mar-2021 17:48];
b = [21
    23
    24
    26
    27
    29];

When I try the following sentence, MATLAB gives me an error:

c=[a,b];

Error using datetime/horzcat (line 1335)

All inputs must be datetimes or date/time character vectors or date/time strings.

I don't know how to merge both columns in a single matrix. Can you help me?

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Answer 1

Mario Malic 2021-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/819285-create-a-matrix-with-columns-of-both-datetime-and-double-format#answer_689720

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Hi,

Use a cell array or a table to do so.

% Using cell array
{datetime('today'), 5}
ans = 1×2 cell array
    {[02-May-2021]}    {[5]}
% Using table
dt = datetime('now');
num = 5;
table(dt, num)
ans = 1×2 table
             dt             num
    ____________________    ___

    02-May-2021 07:20:58     5 

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Steven Lord 2021-5-2

在 MATLAB Online 中打开

A table array would work, but a timetable array has some functionality for working with the date and time data above and beyond what you can do with a table.

dt = datetime('now');
num = 5;
tt = timetable(dt, num)
tt = timetable
             dt             num
    ____________________    ___

    02-May-2021 15:00:13     5 