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Low Variance Filter

DeprecatedKNIME Base Nodes version 4.3.3.v202105242122 by KNIME AG, Zurich, Switzerland

Filters out double-compatible columns, whose variance is below a user defined threshold. Columns with low variance are likely to distract certain learning algorithms (in particular those which are distance based) and are therefore better removed.

Note, the input table should not be normalized.

Options

Variance Upper Bound
Choose a variance value here. The higher the value, the more columns are likely to get filtered out. Choose 0 to filter for columns, which only contain one constant value.
Column Filter
Only columns in the "include" list will be considered for filtering. Any other column will be left untouched (i.e. will also be present in the output table independent of their variance).

Input Ports

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Numeric input data. (Non-numeric columns will be left untouched.)

Output Ports

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Filtered data.

Installation

To use this node in KNIME, install KNIME Base nodes from the following update site:

KNIME 4.3

A zipped version of the software site can be downloaded here.

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Developers

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