How to convert datetime into a number?

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Lu Da Silva 2022-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/1687439-how-to-convert-datetime-into-a-number

编辑： Stephen23 2024-8-6，18:08

I have a table whose first column is a timestamp in the format 08-Jan-2016 05:40:00. How do I convert it into numbers?

Wanted output: 20160108054000.

I know the function yyyymmdd(X) is useful but I also need the time to be added.

Thanks!

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KSSV 2022-4-3

Read about datestr.

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KSSV 2022-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/1687439-how-to-convert-datetime-into-a-number#answer_933454

在 MATLAB Online 中打开

dt = datestr(now,'yyyymmddHHMMSS')
dt = '20220403132156'

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Siddharth Bhutiya 2022-4-5

Avoid using older legacy functions like datestr and datenum. Use the more modern types like datetime to work with timestamped data.

@Lu Da Silva Could you share a code example to demonstrate what you are seeing. This way people can run that on their MATLAB and suggest possible solutions instead of trying to guess what the problem could be.

Boyd Tolton 2024-8-6，17:41

Although datetime does provide more precision than datenum (and requires more memory), this precision is not needed by most applications. Also, you will note that the dir command outputs the datenum for files.

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Stephen23 2024-8-6，17:48

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https://ww2.mathworks.cn/matlabcentral/answers/1687439-how-to-convert-datetime-into-a-number#answer_1495494

编辑：Stephen23 2024-8-6，18:08

在 MATLAB Online 中打开

txt = '08-Jan-2016 05:40:00'
txt = '08-Jan-2016 05:40:00'
dtn = datetime(txt,'InputFormat','d-MMM-y H:m:s', 'Format','yyyyMMddHHmmss')
dtn = datetime
   20160108054000