function pt_scratch3
%save LEOEX M MU U w
load LEOEX
keyboard

return

function [U,w,MU,b] = add_feature(U,w,MU,M,x)
xi = embedX(x,MU);
yh = sign(xi*w);
yt = b2y(run_dfsa(M,x));
b = (yh == yt);
if ~b
  % signs disagree
  N = length(U)+1;
  U{N,1} = x;
  %fprintf('processing x = %s \n',x);
  %MU{N,1} = bool2fsa_pt(['(' x ')'],M.ALF);
  MU{N,1} = shuf2dfsa(x,M.ALF);
  w(N,1) = yt * (1+abs(xi*w));
  %w(N,1) = yt * (1+sum(abs(w)));
end
return