MATLAB: Converting time format from hh mm ss to minutes or seconds

MATLABtime series

I imported a time series in the format of HH:MM:SS from excel to matlab but it appeared as 0.4532343954 or something. How can I convert it to minutes or seconds starting zero.
The time data are in 5 seconds intervals.

Best Answer

Try this: 
Tv = datetime(0.4532343954, 'Format','HH:mm:SS',  'ConvertFrom','excel')
Tv = 
  datetime
   10:52:45
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