Dimension Reduction Big Data Using Recognition of Data Features Based on Copula Function and Principal Component Analysis

Table 1

Estimation of parameter for variables of urine.

	X1	X2	X3	X4	X5	X6
X1	1	-0.30856	0.83231	0.57256	0.81165	0.54872
X2		1	-0.25167	-0.09762	-0.27985	-0.12147
X3			1	0.77226	0.81012	0.58452
X4				1	0.45542	0.43444
X5					1	0.58813
X6						1

X1is urine gravity, X2 is urine pH, X3 is urine osmolarity (it is corresponding to unit of solute concentration), X4 is urine conductivity (it is corresponding to concentration of charged ions in solution), X5 is urea concentration (mM/liter), and X6 is calcium concentration (mM/liter).