MATLAB: Averaging minute data to hour data

rinex data

Greetings all.
My name is Joseph Moses.
I would like this great house to help me on how to average my data into hour and the hourly averaged data into daily.
For instance,
1.How do i get the corresponding average of 0.00:0.983, 1.000:1.983 till 23.00:23.983 in the second column (VTEC Data) from the below data or the attached.
2. Then plot the result Time against VTEC

Best Answer

Try this: 
D = load('bjcoo001-2015-01-01.txt');
M = ceil(D(:,1)+1E-4);
HrMeans = accumarray(M, (1:numel(M)).', [], @(x){mean(D(x,2:4))});
Result = [(0:23).' cell2mat(HrMeans)]
figure
plot(Result(:,1), Result(:,2))
grid
xlabel('Time')
ylabel('VTEC')
producing: 
Result =
         0   10.8497    2.0272    6.3800
    1.0000    8.4937    1.8062    6.3800
    2.0000    7.6810    1.1152    6.3800
    3.0000    6.0948    1.0160    6.3800
    4.0000    3.7198    1.0692    6.3800
    5.0000    3.0660    1.1472    6.3800
    6.0000    8.8583    0.9718    6.3800
    7.0000   18.5332    1.1425    6.3800
    8.0000   26.3258    1.4597    6.3800
    9.0000   32.8312    1.5363    6.3800
   10.0000   39.3363    1.9443    6.3800
   11.0000   45.3585    3.1638    6.3800
   12.0000   49.2812    3.2907    6.3800
   13.0000   51.2610    2.2868    6.3800
   14.0000   53.3373    2.2015    6.3800
   15.0000   49.9703    4.1498    6.3800
   16.0000   45.2548    3.5810    6.3800
   17.0000   37.1800    3.4638    6.3800
   18.0000   24.5763    3.7843    6.3800
   19.0000   16.1022    4.9532    6.3800
   20.0000   14.7298    3.7925    6.3800
   21.0000   14.8348    4.0482    6.3800
   22.0000   13.5453    3.9738    6.3800
   23.0000   14.4595    5.1812    6.3800
EDIT —
Added plot image —
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