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template<typename T>
radarelab::Statistic< T >::compute_variance ( unsigned  minimum = 1)
inline

Compute variance of the distribution of x values.

Parametri
[in]minimumMinimum amount of accumulated data to perform the computation
Restituisce
value of the variance. If N is less the minimum returns NaN

Definizione alla linea 154 del file statistics.h.

Referenziato da radarelab::Statistic< T >::compute_dev_std().

155  {
156  if(M2<0.1e-11)M2=0.;
157  if(N>=minimum) return M2/(double)N;
158  else return sqrt(-1);
159  }