wolffd@0: function index = subv2indMinka(siz,sub)
wolffd@0: %SUBV2IND   Linear index from subscript vector.
wolffd@0: % SUBV2IND(SIZ,SUB) returns an equivalent single index corresponding to a
wolffd@0: % subscript vector for an array of size SIZ.
wolffd@0: % If SUB is a matrix, with subscript vectors as rows, then the result is a 
wolffd@0: % column vector.
wolffd@0: %
wolffd@0: % This is the opposite of IND2SUBV, so that
wolffd@0: %   SUBV2IND(SIZ,IND2SUBV(SIZ,IND)) == IND.
wolffd@0: %
wolffd@0: % See also IND2SUBV, SUB2IND.
wolffd@0: 
wolffd@0: % Written by Tom Minka
wolffd@0: 
wolffd@0: prev_cum_size = [1 cumprod(siz(1:end-1))];
wolffd@0: %index = (sub-1)*prev_cum_size' + 1;
wolffd@0: index = sub*prev_cum_size' - sum(prev_cum_size) + 1;