How to create a loop for a matrix?

Hello I have a November month daily data for 10 stations, matrix of dimension (630*10) from year 1995 to 2015 i.e 1 to 30 rows for November year 95 than next 30 rows for year 96 and so on. I want to find 95th percentile for each year and for each station so that my new matrix dimension(21*10). I want to create a loop for this such that loop will pick up first 30 values and find the percentile than next 30 values and so on.

Answer 1

[Jan]

result = zeros(21, 10);
cursor = 0;
for k = 1:30:630
  startIndex = k;
  endIndex   = k + 30;
  cursor     = cursor + 1;
  result(cursor, :) = YourCalculations(data(startIndex:endIndex, :));    
end

Or in a convenient Matlabish way:

siz    = size(data);
data   = reshape(data, [30, siz(1) / 30, siz(2)]);
result = prctile(data, 95, 1);

[usha d]

thank u for answer my ques but i am getting an error "Index exceeds matrix dimension" line: result(cursor, :) = prctile(data(startIndex:endIndex, :),95,1) and my last 21st row contain all zeros which is wrong