nl_tokens: Adds the given statistics to the dataset as if the individual values used to compute the statistics had been added directly .
pl_tokens: public void addAll ( Stats values ) { if ( values . count ( ) == 0 ) { return ; } if ( count == 0 ) { count = values . count ( ) ; mean = values . mean ( ) ; sumOfSquaresOfDeltas = values . sumOfSquaresOfDeltas ( ) ; <mask> = values . min ( ) ; max = values . max ( ) ; } else { count += values . count ( ) ; if ( isFinite ( mean ) && isFinite ( values . mean ( ) ) ) { // This is a generalized version of the calculation in add(double) above. double delta = values . mean ( ) - mean ; mean += delta * values . count ( ) / count ; sumOfSquaresOfDeltas += values . sumOfSquaresOfDeltas ( ) + delta * ( values . mean ( ) - mean ) * values . count ( ) ; } else { mean = calculateNewMeanNonFinite ( mean , values . mean ( ) ) ; sumOfSquaresOfDeltas = NaN ; } min = Math . min ( min , values . min ( ) ) ; max = Math . max ( max , values . max ( ) ) ; } }