Converting time to a epoch

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John Lee
John Lee on 24 Sep 2021
Edited: Cris LaPierre on 25 Sep 2021
When I have time data of a colum (Excel file) and each column has a data like "15:20:20" which means 3 something p.m.
So, there is only time information but not data. Suppose that the column is 100-by-1.
How can I convert it to time epoch such as a single number.

Answers (1)

Cris LaPierre
Cris LaPierre on 24 Sep 2021
Edited: Cris LaPierre on 25 Sep 2021
In MATLAB, you can read this in as a duration (see options here) using readtable. It may autodetect the time correctly. If not, you can manually specify it using code similar to this:
opts = detectImportOptions("filename.xlsx");
opts = setvartype(opts,1,'duration');
opts = setvaropts(opts,1,'InputFormat','hh:mm:ss');
data = readtable("filename.xlsx",opts)
Once imported, you can modify the format as you like. You can also use the following functions to represent the duration in a single unit of time like days, hours, minutes, and seconds
  1 Comment
John Lee
John Lee on 25 Sep 2021
Thanks you for your help.
I found that one can convert the time to a single number by applying a function in the Excel file.
You can refer to the site on how to do it:

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