nx=120;
ny=31;
nz=29;
nf=2;
h=zeros(nf*nz*ny*nx,1);
chance=1/3;

vectorsize=nx*ny*nz*nf;
dim=1;
obs=0;
fid = fopen('hfile.txt','w');

for i=1:nf
   for j=1:nz
      for k=1:ny 
        for l=1:nx
            if (any(j==[5 10 15 20 25]) & ... % 5 levels
                 k>8 )
%                 mod(l,3)==0 )
%                any(i==[1 2]) & ... % u, v
%                mod(k+1,2)==0)
%                mod(l,3)==0)
%	   if mod(dim,359)==0
%            if (mod(dim,3)==0)
                 h(dim)=dim;
                 fprintf(fid,'%i\n',dim);
                 obs=obs+1;
            end
            dim=dim+1;
         end
      end
   end
end
fclose(fid);
obs
h3=reshape(h,[nx,ny,nz,nf]);