X1 = 0;
X2 = 30;
 
for n=1:20
   X3 = (X1+X2)/2;
   Y3 = Thermistor(X3);
 
   if(Y3 > 0)
      X1 = X3;
   else
      X2 = X3;
   end
   
   disp([n X3, Y3]);
end