Builds and returns the bi-objective Sphere test problem: $$f(\mathbf{x}) = \left(\sum_{i=1}^{n} \mathbf{x}_i^2, \sum_{i=1}^{n} (\mathbf{x}_i - \mathbf{a})^2\right)$$ where $$\mathbf{a} \in R^n$$.
makeBiSphereFunction(dimensions, a = rep(0, dimensions))[integer(1)]
Number of decision variables.
[numeric(1)]
Shift parameter for the second objective. Default is (0,...,0).
[smoof_multi_objective_function]