Separate values for year and month

I have a time series matrix from year 1997 until now, and I want to create a diferent matrix for each year and, after that, separate the months of each year. How can I do that on Matlab?

Matrix example:

Yr Mo Day Hr Min

1997 01 01 00 00

1997 01 01 01 00

...

2016 01 01 00 00

Answer 1

[Azzi Abdelmalek]

Look at this example:

d1=datenum('1997-01-01 00:00','yyyy-mm-dd HH:MM');
d2=datenum('2016-08-31 00:00','yyyy-mm-dd HH:MM');
M=d1:1/24:d2;
d=datevec(M);
[ii,jj,kk]=unique(d(:,1:2),'rows');
out=accumarray(kk,(1:numel(kk))',[],@(x) {d(x,:)})