How i can select max value from huge matrix of 30 years daily data

Lets say i have daily data for 30 years of period in a matrix. To make it simple just assume it has only 1 column and 10957 row indicates the days for 30 years. The year start in 2010. I want to find the max value for every year so that the output will be 1 column and 30 rows. Is there any automated way to program it in Matlab? currently im doing it manually where what i did was:

%for the first year
  max(RAINFALL(1:365);
%for the 30th of year
  max(RAINFALL(10593:10957);

It is exhausting to do it manually and i have quite few of same data sets. Thank You

Answer 1

[Matt J]

v=datevec(datenum([2009 12 31 0 0 0])+(1:10957));

result = accumarray(v(:,1)-2009,RAINFALL,[],@max)

[Saberali Akbar]

I got "Error using accumarray Second input VAL must be a vector with one element for each row in SUBS, or a scalar." when ran the code.

[Matt J]

I've been editing... Make sure you're running my most recent version.

[Saberali Akbar]

Sorry, its not gives error but wrong answers, for example for first year it should be 2.917038 but the code gives 290.6065.

[Matt J]

Make sure you are using accumarray with @max ,

result = accumarray(v(:,1)-2009,RAINFALL,[],@max)

[Saberali Akbar]

Great! that works fine, one last question, if i change the start year date, let say 1 jan 2040, do i need to modify the code? what change i should make?

[Matt J]

The date vector [2009 12 31 0 0 0] must be changed to the day before your start date.

[Saberali Akbar]

Thanks you very much.

[Matt J]

Are you ready to

?