MATLAB: Retrieving minimum values for parts of a matrix

optimization

Hi, I have a matrix containing different rows with values for several years. I need to retrieve the minimum value corresponding to each year. For example: A=[ 1958 2; 1958 3; 1959 4; 1959 5; 1959 6 ] The result matrix that I need would be: B=[ 1958 2; 1959 4 ]
Could you please help with this? Thanks

Best Answer

A=[ 1958 2; 1958 3; 1959 4; 1959 5; 1959 6 ] 
[ii,jj,kk]=unique(A(:,1))
out=[ii accumarray(kk,(1:numel(kk))',[],@(x) min(A(x,2)))]
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