MATLAB: Difference between hours, minutes and seconds

datedifferencehoursminutesseconds

Hi!
I have matrix A
M=[8 8 48;8 15 29;9 30 15;9 48 53;9 49 30;9 52 12;9 57 0;10 2 27;10 28 52;11 29 47;11 43 41;11 44 4];
The first column of the matrix indicates hours, the second minutes and the third seconds. I want to calculate the difference between consecutive rows
Eg. 
M(2,1:3)-M(1,1:3) = 0 6 41
Can you help me? Thanks

Best Answer

See if this does what you want:
M=[8 8 48;8 15 29;9 30 15;9 48 53;9 49 30;9 52 12;9 57 0;10 2 27;10 28 52;11 29 47;11 43 41;11 44 4];
Mdn = datenum([repmat([2017 02 02], size(M,1), 1)  M]);             % Date Numbers
Mdndif = datevec(diff(Mdn));                                        % Date Number Differences As Date Vectors
Out = Mdndif(:, 4:end)                                              % Desired Result
Out =
     0     6    41
     1    14    46
     0    18    38
     0     0    37
     0     2    42
     0     4    48
     0     5    27
     0    26    25
     1     0    55
     0    13    54
     0     0    23
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