/** * Returns the sum of squared deviations of Y from its mean. * * <p>If the model has no intercept term, <code>0</code> is used for the mean of Y - i.e., what is * returned is the sum of the squared Y values. * * <p>The value returned by this method is the SSTO value used in the {@link #calculateRSquared() * R-squared} computation. * * @return SSTO - the total sum of squares * @see #isNoIntercept() * @since 2.2 */ public double calculateTotalSumOfSquares() { if (isNoIntercept()) { return StatUtils.sumSq(Y.getData()); } else { return new SecondMoment().evaluate(Y.getData()); } }
/** * Returns the sum of squared deviations of Y from its mean. * * @return total sum of squares */ public double calculateTotalSumOfSquares() { return new SecondMoment().evaluate(Y.getData()); }