function g=meanshiftinit(x,h) ;% initialize the mean-shift procedure% What is the maximum distance we want to take into accounttolk=1e-3 ; tolx=sqrt(-2*log(tolk)) ;hmax=tolx * h ;   g=rangegrid(x,hmax) ;g.hmax=hmax ;g.h=h ;g.plot=0 ;%g.x=x ;if g.plot,  clf ; plot(x(:,2),x(:,1),'b.') ; axis equal ; hold on ;end ;