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Table 5 The parameters of the second artificial set Gaussian2

From: Big data decision tree for continuous-valued attributes based on unbalanced cut points

i

\(\varvec{ \mu }_{i}\)

\(\varvec{\Sigma }_{i}\)

1

\((0.0, 0.0, 0.0)^\text {T}\)

\(\left[ \begin{array}{ccc} 1.0 &{}0.0 &{}0.0\\ 0.0 &{}1.0 &{}0.0\\ 0.0 &{}0.0 &{}1.0 \end{array}\right]\)

2

\((0.0, 1.0, 0.0)^\text {T}\)

\(\left[ \begin{array}{ccc} 1.0 &{}0.0 &{}1.0\\ 0.0 &{}2.0 &{}2.0\\ 1.0 &{}2.0 &{}5.0 \end{array}\right]\)

3

\((-1.0, 0.0, 1.0)^\text {T}\)

\(\left[ \begin{array}{ccc} 2.0 &{}0.0 &{}0.0\\ 0.0 &{}6.0 &{}0.0\\ 0.0 &{}0.0 &{}1.0 \end{array}\right]\)

4

\((0.0, 0.5, 1.0)^\text {T}\)

\(\left[ \begin{array}{ccc} 2.0 &{}0.0 &{}0.0\\ 0.0 &{}1.0 &{}0.0\\ 0.0 &{}0.0 &{}3.0 \end{array}\right]\)