getNgram.m

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% This file is part of VSA_Toolbox.                                       %
%                                                                         %
% Copyright (C) 2020 Chair of Automation Technology / TU Chemnitz         %
% For more information see https://www.tu-chemnitz.de/etit/proaut/vsa     %
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% VSA_Toolbox is free software: you can redistribute it and/or modify     %
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% (at your option) any later version.                                     %
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% VSA_Toolbox is distributed in the hope that it will be useful,          %
% but WITHOUT ANY WARRANTY; without even the implied warranty of          %
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           %
% GNU General Public License for more details.                            %
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% You should have received a copy of the GNU General Public License       %
% along with Foobar.  If not, see <http://www.gnu.org/licenses/>.         %
%                                                                         %
% Author: Kenny Schlegel (kenny.schlegel@etit.tu-chemnitz.de)             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


function ngram = getNgram(VSA, keys, char_item_memory, seq_item_memory)

key_codes = double(keys);
num_ngrams = length(key_codes);
%create ngrams
ngram = VSA.permute(char_item_memory(:,key_codes(1)));
for i=2:num_ngrams
    ngram = VSA.bind(ngram,VSA.permute(char_item_memory(:,key_codes(i)),i));
end

end