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chappjc/knedlsepp5cumsumaccumarray.m

Created March 16, 2015 23:41
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knedlsepp5cumsumaccumarray.m
function V = knedlsepp5cumsumaccumarray(values, runLengths)
% knedlsepp's solution to run-length-decoding originally from http://stackoverflow.com/a/28615814/2778484
% (results in http://stackoverflow.com/a/29079288/2778484)
%// Actual computation using column vectors
V = cumsum(accumarray(cumsum([1; runLengths(:)]), 1));
V = V(1:end-1);
V = reshape(values(V),[],1);
end
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