Computational Methods for Data Analysis

The calculation of Gini( VIV) value for j: 7 (see Section 6.5 eq. (6.8)).

$\begin{array}{l}{\text{Gini}}_{\text{left}}\left(\text{VIV}\right)=1-\left[{\left(3/5\right)}^2+{\left(2/5\right)}^2\right]=0.48\\ {\text{Gini}}_{\text{right}}\left(\text{VIV}\right)=1-\left[{\left(3/5\right)}^2+{\left(2/5\right)}^2\right]=0.48\\ \text{Gini}\left(\text{VIV}\right)=\left(5\left(0.48\right)+5\left(0.48\right)\right)/10=0.48\end{array}$

The calculation of Gini(VIP) value for j: 8 (see Section 6.5; eq. (6.8)) is as follows:

$\begin{array}{l}{\text{Gini}}_{\text{left}}\left(\text{VIP}\right)=1-\left[{\left(3/5\right)}^2+{\left(2/5\right)}^2\right]=0.48\hfill \\ {\text{Gini}}_{\text{right}}\left(\text{VIP}\right)=1-\left[{\left(3/5\right)}^2+{\left(2/5\right)}^2\right]=0.48\hfill \\ \text{Gini}\left(\text{VIP}\right)=\left(5\left(0.48\right)+5\left(0.48\right)\right)/10=0.48\hfill \end{array}$

The calculation of Gini(VIT) value for j: 9 (see Section 6.5; eq. (6.8)) is as follows:

$\begin{array}{l}{\text{Gini}}_{\text{right}}\left(\text{VIT}\right)=1-\left[{\left(5/5\right)}^2+{\left(0/5\right)}^2\right]=0\\ {\text{Gini}}_{\text{left}}\left(\text{VIT}\right)=1-[{(1/5}^{}\end{array}$