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稳健拟合离群值 - 选择不同的行集并将其排除为离群值

Georg
Level VII

亲爱的社区,

我有一个堆积的数据表,并且想通过标签排除异常值(例如用于某些测量的元素)。

在稳健的拟合离群值平台中,我可以检测离群值,然后选择或排除相应的行。

根据我的理解,选择或排除的行应该完全相同。

下面的 JSL 中使用的示例数据表就是这种情况。

 

// from scripting index

Names Default To Here( 1 );

dt = Open( "$SAMPLE_DATA/Water Treatment.jmp" );

// similar, but stacked data and usage of by role

dt_stack = dt << Stack(
 columns( Column Group( "Sensor Measurements" ) ),
 Source Label Column( "Label" ),
 Stacked Data Column( "Data" ),
 Output Table( "Water Treatment stacked.jmp" )
);

obj_select = dt_stack << Explore Outliers( Y( :Data ), By( :Label ), Robust fit outliers, select rows() );
obj_exclude = dt_stack << Explore Outliers( Y( :Data ), By( :Label ), Robust fit outliers, exclude rows() );
Show( N Items( dt_stack << get selected rows() ), N Items( dt_stack << get excluded rows() ) );

但在我使用真实数据的情况下,我选择并排除了不同的行,在我看来,该平台在识别离群值方面效果很好,但排除操作无法排除一行(已被选为离群值)。

对这种行为有什么想法吗?

 

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