% Matlab function genmat.m (by Q. Ye) 

function A = genmat(n, c)
%
% Input parameters: 
%
%   n: Matrix dimension 
%   c: condition no. of A 
%
% Output :
%
%  A: a random matrix with condition number c 
%
         A = randn(n,n);
         [U, D, V] = svd(A); 
         for i=0:(n-1) 
           D(i+1,i+1) = c^(-i/(n-1)); 
         end
%
        A=U*D*V';