Table 4.

Levenberg-Marquardt fit results.

	Conventional model fits				Separable parameter space fits
Model	Initial condition	Number of iterations (mean ± SD)	WSSE difference (median [range])	Magnitude error vector (median [range])	Number of iterations (mean ± SD)	WSSE difference (median [range])	Magnitude error vector (median [range])
2K	Random	314 ± 390	314 [0–76705]	5.300 [0–6.97]	19 ± 16	0.00 [0–76706]	0.001 [0.00–4.97]
	Minimum	205 ± 349	205 [0–814]	1.900 [0–2.88]	20 ± 24	0.00 [0–18.9]	0.001 [0.00–1.99]
	Midrange	123 ± 250	167 [0–1045]	1.100 [0–1.32]	20 ± 6	0.00 [0–0]	0.000 [0.00–0.11]
3K	Random	117 ± 260	3214 [0–136933]	2.990 [0.0–6.05]	15 ± 14	26 [0–695]	0.084 [0.00–7.14]
	Minimum	906 ± 234	107 [0–1393]	1.909 [0.062–4.82]	15 ± 18	32 [0–285]	2.881 [0.00–4.38]
	Midrange	117 ± 178	155 [10–2566]	1.008 [0.065–3.56]	28 ± 18	0.00 [0.0–0.0]	0.000 [0.00–0.002]
4K	Random	287 ± 389	1593 [0–56568]	2.357 [0.01–5.39]	130 ± 177	282 [0–16545]	1.550 [0.00–3.23]
	Minimum	723 ± 422	460 [0–54330]	1.894 [0.02–2.94]	62 ± 171	0.00 [0–796]	0.004 [0.00–2.79]
	Midrange	483 ± 460	16 [0–245]	1.478 [0.00–2.01]	80 ± 124	0.00 [0.0–0.0]	0.000 [0.00–0.01]