spearmanrrows.m

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

function r=spearmanrrows(x)
% function r=spearmanrrows(x)
% return Spearman Rank Correlation matrix
% can only give the correlation of the rows!
% Requires the Spearman Rank matrix to be applied rows,
% or the program will give absurd result.
% NEVER apply this program on collums!
[m n]=size(x);
r=zeros(m,n);
for i=1:m-1
    for k=i+1:m
        sum=0;
        for j=1:n
             temp=(x(i,j)-x(k,j))^2;
             sum=sum+temp;
        end
        r(k,i)=1-6*sum/(n^3-n);
    end
end