function data = load_singer(do_preprocessing, do_zscore)
% LOAD_SINGER - Loads the singer dataset and applys some 
% preprocessing/dimensionality reduction if desired  
% 
% Written by:
% -- 
% John L. Weatherwax                2005-08-14
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

addpath( '../../Code/eda_data' );

load singer; data = [Alto_1;Alto_2;Bass_1;Bass_2;Soprano_1;Soprano_2;Tenor_1;Tenor_2];
% n=number of samples=235;
% p=number of features=1;
[n,p] = size(data);       

% apply some preprocessing to our data ...
%  
if( do_preprocessing )
  f_mu = mean( data ); 
  f_sd = std( data ); 

  % compute the z-score of this data: 
  if( do_zscore )
    data_t = ( data - repmat( f_mu, [n,1] ) ) ./ repmat( f_sd, [n,1] ); 
    data = data_t; 
  end
end