Table 3.

Numerical results for the pitprops example.

	PC 1			PC 2			PC 3
Variables	PCA	SPCA	SFPCA	PCA	SPCA	SFPCA	PCA	SPCA	SFPCA
topdiam	0.404	0.477	0.408	0.218			−0.207
length	0.406	0.476	0.408	0.186			−0.235
moist	0.124			0.541	0.785	0.707	0.141
testsg	0.173			0.456	0.620	0.707	0.352
ovensg	0.057	−0.177		−0.170			0.481	0.640	0.707
ringtop	0.284		0.052	−0.014			0.475	0.589	0.707
ringbut	0.400	0.250	0.408	−0.190			0.253	0.492
bowmax	0.294	0.344	0.408	−0.189	-0.021		-0.243
bowdist	0.357	0.416	0.408	0.017			-0.208
whorls	0.379	0.400	0.408	−0.248			-0.119
clear	−0.011			0.205			-0.070
knots	−0.115			0.343	0.013		0.092	−0.015
diaknot	−0.113			0.309			−0.326	−0.308519
AV (%)	32.4	28.0	31.5	18.3	14.4	15.1	14.4	13.3	10.1
ACV (%)	32.4	28.0	31.5	50.7	42.0	46.6	65.1	55.3	56.7
	PC 4			PC 5			PC 6
topdiam	−0.091			0.083			0.120
length	−0.103			0.113			0.163
moist	0.078			−0.350			−0.276
testsg	0.055			−0.356			−0.054
ovensg	0.049			−0.176			0.626
ringtop	-0.063			0.316			0.052
ringbut	−0.065			0.215			0.003
bowmax	0.286			−0.185			−0.055
bowdist	0.097			0.106			0.034
whorls	−0.205			−0.156			−0.173
clear	0.804	1.000	1.000	0.343			0.175
knots	−0.301			0.600	1.000	1.000	−0.170
diaknot	−0.303			−0.08			0.626	1.000	1.000
AV (%)	8.5	7.4	8.0	7.0	6.8	7.3	6.3	6.2	7.0
ACV (%)	73.6	62.7	64.7	80.6	69.5	72.0	86.9	75.8	79.0