Table 8: Results of PCA for Sample 3.
Set Principal Component Eigen value Cumulative $\%$
S1( $R_{\rm gc}, M_{V}, R_{\rm c}$) 1 1.5 50.9
  2 1.0 84.6
  3 0.5 100.0
S2( $R_{\rm gc}, M_{V}, c$) 1 1.6 54.4
  2 0.9 84.1
  3 0.5 100.0
S3( $R_{\rm gc}, M_{V}, c, R_{\rm c}$) 1 2.0 50.0
  2 1.4 85.7
  3 0.5 97.7
  4 0.1 100.0
S5( $c,R_{\rm c},B-V$) 1 1.7 58.3
  2 1.0 91.9
  3 0.2 100.0
S6( $c,R_{\rm c}$,[Fe/H]) 1 1.9 64.1
  2 1.0 96.1
  3 0.1 100.0
S7( $R_{\rm gc}, M_{V}, \mu_{V}$) 1 2.3 75.5
  2 0.5 92.2
  3 0.2 100.0
S8( $R_{\rm gc},[{\rm Fe/H}],V_{\rm r}$) 1 1.8 60.5
  2 0.7 83.3
  3 0.5 100.0


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