Lines Matching refs:sigma2
147 double sigma2; /* average squared error (roughly) */
250 datum_pts->sigma2 = 0.0; /* initialize the sigma2 to 0 */
751 if (datum_pts->sigma2 == 0.0) {
753 datum_pts->sigma2 = abserr*abserr;
755 datum_pts->sigma2 = DATUM_MAX_ERROR2;
759 datum_pts->sigma2 = 0.95*datum_pts->sigma2 + 0.05*abserr*abserr;
761 datum_pts->sigma2 = 0.95*datum_pts->sigma2 + 0.05*DATUM_MAX_ERROR2;