Re: Smoothing Functions without distorting matrices' edges

[Przemek Klosowski]

   This may be slightly OT, but maybe someone may know an easy
   function to do this - smooth a matrix without severely
   distorting the edges.  

Perhaps pad the matrix, and smooth it? 

a=[1 2 3; 4 5 6; 7 8 9];
b=zeros(size(a)+2);
b(2:end-1,2:end-1)=a;

Even better, duplicate the edge values before smoothing:

b(2:end-1,1)=a(1:end,1);
b(1,1)=a(1,1) 

etc. for the other three edges. By the way, can anyone think of a
simpler way of doing that?