somtoolbox2/som_sub2ind.m
 4dbef185 function inds = som_sub2ind(msize,Subs) %SOM_SUB2IND Linear index from map grid subscripts. % % ind = som_sub2ind(msize,Subs) % % ind = som_sub2ind([10 15],[4 5]); % ind = som_sub2ind(sMap,[4 5]); % ind = som_sub2ind(sMap.msize,[4 5]); % inds = som_sub2ind([10 15],[4 5; 3 2; 1 10]); % % Input and output arguments: % msize (struct) map or topology struct % (vector) size 1 x m, specifies the map grid size % Subs (matrix) size n x m, the subscripts of n vectors % % inds (vector) size n x 1, corresponding linear indeces % % See also SOM_IND2SUB. % Contributed to SOM Toolbox vs2, February 2nd, 2000 by Juha Vesanto % http://www.cis.hut.fi/projects/somtoolbox/ % juuso 300798 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if isstruct(msize), if strcmp(msize.type,'som_map'), msize = msize.topol.msize; elseif strcmp(msize.type,'som_topol'), msize = msize.msize; else error('Invalid first argument.'); end end % check off-limits [n d] = size(Subs); offl = find(Subs < 1 | Subs > msize(ones(n,1),1:d)); Subs(offl) = NaN; % indexes k = [1 cumprod(msize(1:end-1))]'; inds = 1 + (Subs-1)*k; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%