gen_scale.m

clustering_code ,Clustering Through Ranking On Manifolds Version 0.2 Copyright by Markus Breit

function [X_out, A, B] = Gen_Scale(X,lb,ub)

%
% Clustering Through Ranking On Manifolds
% Version 0.2
%
% Copyright by Markus Breitenbach and Gregory Z. Grudic
% This code is for your personal and research use only.
%
% http://www.cs.colorado.edu/~grudic/
% http://ucsu.colorado.edu/~breitenm/
%
% This software is provided "as is," without warranty of any kind, express
% or implied.  In no event shall the authors be held liable
% for any direct, indirect, incidental, special or consequential damages
% arising out of the use of or inability to use this software.
%

%lb = 0;, ub = 1;

X_out = zeros(size(X));

n = size(X,2); % input dimension 
sca = zeros(n,1);
mina = zeros(n,1);
maxa = zeros(n,1);
A = zeros(n,1);
B = zeros(n,1);
for i=1:n
   mina(i) = min(X(:,i));
   maxa(i) = max(X(:,i));
   sca(i) = maxa(i) - mina(i);
end

for i=1:n
   if abs(sca(i)) > eps
      A(i) = (ub - lb)/sca(i);
      B(i) = lb - A(i)*mina(i);
      X_out(:,i) = A(i)*X(:,i) + B(i);
   else
      A(i) = 1.0;
      B(i) = -mean(X(:,i));
      X_out(:,i) = A(i)*X(:,i) + B(i);
   end
end