d2r.m

A 2D homogeneous Helmholtz case (u=sin(x)cos(y) with a square) with ％ two Dirichlet edges (x=1,y=1

% 2D Euclidean distance function for RBF

function D2r=D2r(xr,xs,yr,ys)

D2r=sqrt((xr-xs)^2+(yr-ys)^2);