code: function calculateTotalError(errorMatrix)
  {
  	var totError = 0.0;
  	for(var i = 1; i <= errorMatrix.rows(); i++)
  	{
  		for(var j = 1; j <= errorMatrix.cols(); j++)
  		{
  			totError += Math.pow(errorMatrix.e(i, j), 2);
  		}
  	}
  	
  	return totError;
  }
docs: Computes the total error based on a matrix of error values.
  @param errorMatrix A matrix of the error values.
  @returns float Total error, defined as the sum of the squared errors.