How to use

cost

method

in

org.ddogleg.optimization.trustregion.UnconLeastSqTrustRegion_F64

@Test
public void costFunction() {
  UnconLeastSqTrustRegion_F64<DMatrixRMaj> alg = createAlg();
  alg.functionResiduals = new MockFunctionNtoM(new double[]{-1,2,-3},1);
  alg.residuals.reshape(3,1);
  double expected = 0.5*(1+4+9);
  double found = alg.cost(new DMatrixRMaj(1,1));
  assertEquals(expected,found, UtilEjml.TEST_F64);
}