annotate tests/pointset_test/lshL.m @ 554:600b87550b83

Improve the behaviour of the RDF example a little bit.

Automatically create the database if it doesn't exist yet.

Write a little explanatory comment about how we could be cleverer.

function L = lshL(w,k,delta)
if nargin<3, delta=0.01;end
if nargin<2, k=10;end
if nargin<1, w=4;end

P1=lshP(w,1);
L = ceil(log(1./delta)/-log(1-P1^k));

endfunction