MATLAB: Looping through data and finding maximum value in each bin

Question

I have a dataset:

ds = BIN VALUE ID
     10  5     1 
     10  6     2 
     11  3     2 
     11  7     1 
     11  4     1

Bins are unique. I need to find the ID with the maximum VALUE for each BIN. Example output in the above example:

MAX = BIN VALUE ID 
      10  6     2  
      11  7     1

This was my attempt to loop through the data producing output where each column is a BIN and the row contain the VALUES. I was then going to find the maximum of each bin (column) but the values didn't sort right.

bin = unique(ds(:,1));
val = ds(:,2);
b=numel(bin);
a=cell(b,1);
for i=1:b
    a{i}=ds(ds(:,1)==idate(i),2:3); 
    for j=1:length(a{i})
        output(j,i)=(a{i}(j)); 
    end
end

I'm probably over complicating this. I have Matlab 2011. Thanks in advance for your time!

Answer 1

ds = [...
     10  5     1
     10  6     2
     11  3     2
     11  7     1
     11  4     1 ];
d1 = sortrows(ds,[1 2]);
[~,ii] = unique(d1(:,1));
out = d1(ii,:);