domainfct.m

来自「本代码为基于matlab的求解偏微分方程的利用径向基函数的无网格方法的源码」· M 代码 · 共 6 行

function z=domainfct(x,y) % zero on boundary, positive outside,
                          % negative inside the domain.
[phi,r]=cart2pol(x,y);
z=r-bndfct(phi);          % this makes the normal derivative =1