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Select by Weights (Multi)

Synopsis​

This operator allows you to select columns by a given criterion such as correlation

Description​

This operator allows you to filter a given data set for the most dependent attributes. The dependency measure can be chosen with the parameter method.

This operator combines the functionality of several other operators like Weight by Correlation in combination with Select by Weights.

Unlike most other Weight by Operator, this operator also allows weights. You can use weights by setting the column containing the weights to the role 'weight.

Input​

exa​

The table you want to filter.

Output​

exa​

The filtered table.

ori​

The original table.

wei​

A table with the attribute names and their respective names. Incompatible attributes contain a missing value for their weight.

Parameters​

Method​

The method you want to use to calculate the weights.

Filter method​

Allows you to define if you want to choose the top k attributes or all attributes above a given threshold.

K​

How many attributes should be selected. Only available if you choose top k as filter method.

Min value​

The threshold which is needed to select a given attributes. Only available if you choose greater equals as filter method

Use absolutes​

If set to true the operator will calculate absolute values of the given performance measure.

Keep incompatible​

If set to true incompatible attribute will remain in the result table. Incompatible attributes are for example nominal values for Pearson Correlation Coefficient, since the Pearson Correlation Coefficient is not defined for nominal attributes or labels.