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. Author manuscript; available in PMC: 2014 Nov 20.
Published in final edited form as: SIAM J Sci Comput. 2014;36(2):C95–C118. doi: 10.1137/120866580

Fig. 2.

Fig. 2

The overall running time of LSRN and the running time of each LSRN stage with different oversampling factor γ for a randomly generated problem of size 105 × 103. For this particular problem, the optimal γ that minimizes the overall running time lies in [1.8, 2.2].