final List<String> names = Arrays.asList("1", "2"); final NamedVariableLeastSquaresRegressionResult result1 = new NamedVariableLeastSquaresRegressionResult(names, ols .regress(x, null, y1, false)); final NamedVariableLeastSquaresRegressionResult result2 = new NamedVariableLeastSquaresRegressionResult(names, ols .regress(x, null, y2, true)); try { result1.getPredictedValue((Map<String, Double>) null);