OptValFunc toolbox aims at operating an optimal-value function in the form

where $x\in\mathbb{R}^{n_x},y\in\mathbb{R}^{n_y}$ and $g:\mathbb{R}^{n_x\times n_y}\rightarrow \mathbb{R}^{n_g}$. Read more in the menu-of-BiOpt. The toolbox provides two tools: SolOVF solves the above minimization problem with providing the function values and corresponding optimal solutions. PlotOVF plots the graph of $\psi(x)$ along with $x$. Thus for the purpose of visualization, the dimension $n_x$ of $x$ must be 1 (for two dimensional space) or 2 (for three dimensional space). For example，