spearmanrankcollums.m

用于文本语义分析的潜在语义分析算法LSA(Latent Semantic Analysis)

function y=spearmanrankcollums(x)
%  y=spearmanrankcollums(x)
%  return Spearman Rank matrix of m*n matrix x 
%  give the result of rank within collums!
%  y is the output matrix
min=-100;
[m n]=size(x);
y=zeros(m,n);
for i=1:n
    for j=1:m
        index=1;
        for k=1:m
            if x(k,i)>x(index,i)
                index=k;
            end
        end
        x(index,i)=min;
        y(index,i)=j;
    end
end