Table 2.

The results of the walking experiments.

	Groups	Height	Step Number	Mean step Length (m)	Actual Path Length (m)	Walking Distance (m)	Error Rate (%)	Average Error (%)	Standard Deviation
The method based on f and $var$	1	155	638	0.7408	400	472.6304	18.16	7.904	5.8297
	2	158	820	0.6933	453	568.4709	25.49
	3	160	636	0.7699	453	489.6721	8.09
	4	161	634	0.7868	453	498.8594	10.12
	5	162	616	0.7058	400	434.7728	8.69
	6	163	659	0.6811	400	448.8564	12.21
	7	164	501	0.7119	400	356.6674	10.83
	8	165	578	0.7027	400	406.1556	1.53
	9	166	607	0.6845	400	415.5034	3.87
	10	167	615	0.6894	400	423.9888	5.99
	11	168	572	0.6736	400	385.2728	3.68
	12	170	636	0.6922	453	440.2300	2.82
	13	171	513	0.7317	400	375.3375	6.17
	14	172	532	0.7284	400	387.5195	3.12
	15	173	482	0.7451	400	359.1375	10.21
	16	175	567	0.6879	400	390.0232	2.49
	17	177	475	0.7956	400	377.9307	5.52
	18	180	549	0.7477	400	410.4711	2.62
	19	181	540	0.6722	400	366.7747	8.31
	20	184	618	0.6732	453	416.0329	8.16
The proposed method	1	155	638	0.6385	400	407.5732	1.89	2.2215	1.3088
	2	158	820	0.5649	453	463.2410	2.26
	3	160	636	0.6866	453	436.7043	3.59
	4	161	634	0.7404	453	469.4238	3.63
	5	162	616	0.6455	400	397.6452	0.59
	6	163	659	0.6175	400	406.9507	1.74
	7	164	501	0.7762	400	388.8873	2.78
	8	165	578	0.6790	400	392.4701	1.88
	9	166	607	0.6540	400	397.0079	0.75
	10	167	615	0.6714	400	412.9192	3.23
	11	168	572	0.6581	400	376.4516	5.88
	12	170	636	0.6154	400	395.0054	1.25
	13	171	513	0.7640	400	391.9444	2.01
	14	172	532	0.7577	400	403.0730	0.77
	15	173	482	0.7989	400	385.0925	3.73
	16	175	567	0.6949	400	394.0304	1.49
	17	177	475	0.8211	400	390.0489	2.49
	18	180	549	0.8358	453	458.8721	1.3
	19	181	540	0.7236	400	390.7405	2.31
	20	184	618	0.7267	453	449.0835	0.86