samer@21: % zeromin - shift values so minimum is zero
samer@4: %
samer@21: % zeromin :: 
samer@4: %    [D:[[E]]] ~'E dimensional array of size D', 
samer@4: %    1..D      ~'dimension to normalise along' 
samer@4: % -> [D] ~'shifted data'.
samer@21: %
samer@21: % Dimension defaults to 1.
samer@21: function x=zeromin(x,dim), x=addnorm(@(y)min(y,[],dim),x); end
samer@4: