% sq(A)  is similar to squeeze(A) except that elements =0 are set to NaN
%
% sq(A)             0   -> NaN
% sq(A,val1)       val1 -> NaN
% sq(A,val1,val2)  val1 -> val2

function [A] = sq(B,varargin);
A=squeeze(B);
if nargin>=2
 nodata=varargin{1};
else
 nodata=0;
end
if nargin==3
 newval=varargin{2};
else
 newval=NaN;
end
%A(find(A==nodata))=A(find(A==nodata))*NaN;
A(find(A==nodata))=newval;