Low Variance Filter

This Node Is Deprecated — This version of the node has been replaced with a new and improved version. The old version is kept for backwards-compatibility, but for all new workflows we suggest to use the version linked below.

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

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

Output Ports

: Filtered data.

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Installation

To use this node in KNIME, install the extension KNIME Base nodes from the below update site following our NodePit Product and Node Installation Guide:

v5.2

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

Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.2.2.v202403061155

On NodePit since: 2023-12-06

Last update: 2024-04-19

Tags: Deprecated

KNIME versions: Since v4.2

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