clustering_proj.m
3225d2ffcba7master

clustering_proj.m
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			function u_ = clustering_proj(u, k)
			% This function takes the projection onto intersection of two sets which
			% are non-negativity and l2 norm-ball of radius sqrt(k)
			% u > 0 and \|\|u\|\| <= sqrt(k)

			u_ = subplus(u);
			u_ = u_.*min(sqrt(k)/norm(u_, 'fro'), 1);
			end