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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Comparison of time entries
Replies: 11   Last Post: Apr 25, 2012 1:33 PM

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Johannes

Posts: 4
Registered: 6/22/11
Comparison of time entries
Posted: Apr 24, 2012 9:50 AM
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Hi, I really hope you can help me.

I'm looking for a way to compare two time entries in an Excel-File effectively.
The entries are given in the form 'hh:mm:ss' e.g. '14:28:30'.

I would like to figure out the chronological order of the two entries.
So, how is it possible to determine, that '17:50:23' is later than '17:45:33' for example?

I tried to use the function datenum.

a =datenum('14:52:49') = 7.364215839004630e+005
b =datenum('15:50:49') = 7.363616255671296e+005
_____________________________________________

a - b = -59.958333333372138

Why is the result negative?

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