gof_totalpower

  GOF_TOTALPOWER - Simple computation of how much 'power' of a signal is accounted for by a fit

  [GF, TOTAL_POWER, FIT_POWER, RES_POWER, RES] = GOF_TOTALPOWER(S, F)

  Computes the amount of total power of a signal, the total power of
  a F of S, and the fraction of the total power that is described
  by the fit. No effort is made to account for how much of the signal S
  may be noise.

  Total power is computed by taking the average value of the square of
  the signal S and the square of the signal F. This differs from the coefficient of
  determination, where the mean is subtracted.

  GF = (FIT_POWER)/(TOTAL_POWER)

  RES_POWER is the power of the residual RES which is S - F.

  S and F are expected to be vectors.