Linear Discriminant Analysis

This node performs Linear Discriminant Analysis (LDA) which is a dimensionality reduction technique. It takes class information into account in order to project the data into a space in which classes are well separated. The results are similar to Principle Component Analysis (PCA) and may be used in subsequent classification.

This node is equivalent to using a Linear Discriminant Ananlysis Compute node in combination with a Linear Discriminant Analysis Apply node. This pattern may be useful when applying a transformation to multiple datasets.

Options

Target dimensions
Number of dimensions to reduce the input data to. This cannot exceed the number of classes minus one or the number of selected columns, depending on which one is smaller.
Class column
Column containing class information.
Column selection
Columns containing the input data.
Remove original data columns
If checked, the columns containing the input data are removed.
Fail if missing values are encountered
If checked, execution fails when the selected columns contain missing values. Otherwise, rows containing missing values are ignored during computation.

Input Ports

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Input table containing numeric columns and one column with class information.

Output Ports

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The original data (if not excluded) plus columns for the projected dimensions.

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Installation

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

v5.4

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

Plugin provider: KNIME AG, Zurich, Switzerland
Plugin version: 5.4.0.v202408311922
On NodePit since: 2024-12-06
Last update: 2024-12-21
KNIME versions: Since v4.0

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