Fig 2. Effect of the input-output encoding and the co-mutated parameters on the search speed and availability of solutions for various logic problems.
This effect is conveyed through the number of generations needed to find a solution, where the colour ‘tan’ means no solutions found. This is performed for (A) [-2, 2] mV and (B) [-1, 1] mV weight clipping range during evolution. (C) Wτc only solutions can simulate delays. Left, the spiking plot for a sample XNOR problem and right, an enlarged view for the voltage traces with their sum. Abbreviations code, W: weights, τc: time constants, D: delays. For more details, see Table A in S1 Text and the related text.