MATLAB: How to convert hours, minutes, seconds to seconds

time

Hi,
How can I return an array with
hh:min:sec
into
seconds?
For example
VarName2(1:5)
ans = 
    '14:54:25'
    '14:54:25'
    '14:54:25'
    '14:54:26'
    '14:54:26'
into a array with seconds?

Best Answer

Assuming you mean seconds in the day
    % initialize variables
    NUM_SECONDS_PER_DAY = 86400.0;
    timeStrings = {'14:54:25';'14:54:25';'14:54:25';'14:54:26';'14:54:26'};
    % convert times to fractional days using datenum
    timeFractionalDays = datenum(timeStrings);
    % leave only the part with the most recent day fraction
    timeDayFraction = mod(timeFractionalDays,1);
    % multiply by number of seconds in a day
    timeInSeconds = timeDayFraction .* NUM_SECONDS_PER_DAY
This produces the result
    timeInSeconds =
       1.0e+04 *
        5.3665
        5.3665
        5.3665
        5.3666
        5.3666
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