Table 2 Estimation of D₂ correlation dimension using correlation sum based method and rotational spectrum based method for fire pattern recorded in electrical circuit as in Fig. 8 or with some components removed – Circuits with non-zero estimate for D₂ dimension.

Circuit no.	DC_input,2 frequency	DC_input,3 frequency	DC_input,5 frequency	Back synapses (R_i,i paths)	R_ground paths	Trashing paths (R_out paths)	N4, N5	Max. detected interval (in 5 µs time steps)	Estimated correlation dimension D2 including 90% confidence interval using correlation sum based method	Coefficient of determination R₂ for regression used for estimating D2	Estimated correlation dimension D2 including 90% confidence interval using rotational spectrum based method	Coefficient of determination R₂ for regression used for estimating D2
1	200	200	223	-	-	-	+	891	0.807±0.011	0.991	0.794±0.002	0.999
2	200	200	223	+	-	-	+	891	0.765±0.009	0.995	0.767±0.003	0.999
3	200	200	223	-	+	-	+	886	0.664±0.009	0.993	0.654±0.004	0.994
4	200	200	223	+	+	-	+	886	0.664±0.009	0.993	0.654±0.004	0.994
5	200	200	223	-	-	+	+	971	1.143±0.010	0.998	1.141±0.002	1.000
6	200	200	223	+	-	+	+	971	1.146±0.007	0.997	1.141±0.003	0.999
7	200	200	223	-	+	+	+	969	0.626±0.004	0.998	0.623±0.001	1.000
8	200	200	223	+	+	+	+	969	0.622±0.003	0.999	0.625±0.003	0.996
9	200	223	200	+	+	+	+	890	0.700±0.003	0.997	0.700±0.002	0.999

Back synapses ‘-’ value: All recurring paths with R_i,i and adjacent diodes are removed.
R_ground paths ‘-’ value: All R_ground paths are removed, the capacitor is left connected to ground.
Trashing paths ‘-’ value: All trashing paths (R_out paths) and adjacent diodes and grounding are removed.
N4, N5 ‘-’ value: Units N4 and N5 together with all their input and output paths are removed.

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