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vis.frequency.dog_error

 DOG_ERROR computes squared error of difference of gaussians to data

   ERR=DOG_ERROR( PARAMS, X, Y)
   ERR=DOG_ERROR( PARAMS, X, Y, STE)

      PARAMS = [ R0 RE SE RI SI ]   (see HELP VIS.FREQUENCY.DOG_ERROR>DOG)
      X = x values of data
      Y = y values of data

      Extra error is given for negative values at 0

   2003, Alexander Heimel, (heimel@brandeis.edu)