%this function does a running mean along dimension dim_cur,
%averaging over indices [-nb_cur:nb_cur]
%
function [field_out]=runmean(field_in,nb_cur,dim_cur);

if nb_cur~=0

size_cur=size(field_in); 

perm1to2=[1:length(size_cur)]; 
perm1to2=[dim_cur perm1to2(find(perm1to2~=dim_cur))];
perm2to1=[[1:dim_cur-1]+1 1 [dim_cur+1:length(size_cur)]]; 
size_cur2=size_cur(perm1to2);

field_in2=permute(field_in,perm1to2); 

field_out2=zeros(size_cur2);
count_out2=zeros(size_cur2(1),2);
for tcur=-nb_cur:nb_cur
	tmp1=[tcur:tcur-1+size_cur2(1)];
	tmp2=find(tmp1>=1&tmp1<=size_cur2(1));
	field_out2(tmp2,:)=field_out2(tmp2,:)+field_in2(tmp1(tmp2),:);
	count_out2(tmp2,:)=count_out2(tmp2,:)+1;
end
for tcur=1:size_cur2(1);
	field_out2(tcur,:)=field_out2(tcur,:)/count_out2(tcur);
end

%field_out=field_in-permute(field_out2,perm2to1); 
field_out=permute(field_out2,perm2to1);

else
field_out=field_in;
end%if nb_cur~=0