% grabk was implemented before fpc.
% Now one could replace grabk with fpc, only requesting the first output.

xx = randn(10,1e5);
timeit(@() fpc(xx,100), 1)
timeit(@() fpc(xx,100), 2)
timeit(@() grabk(xx,100), 1)

% I could deprecate and remove grabk, but not going to right now.