Erratum: The missing memristor found

Nature 453, 80–83 (2008) In Fig. 2a of this Letter, the resistance for the right-hand element of the bottom circuit should be R OFF(1 - w/D), instead of the shown value R OFF w/D. Also, the correct value of window function should be w(D - W)/D 2, rather than w(1 - W)/D 2. All simulation results presented in the paper use the correct formulae.