Spark Correlation Matrix

This node computes the correlation matrix for the selected input columns using the MLlib Statistics package.

Options

Correlation method

Feature columns

Columns to compute the correlation for

: Spark DataFrame/RDD representing the correlation matrix.
: Correlation variables in a square matrix
: A model containing the correlation measures. This model is appropriate to be read by the Spark Correlation Filter node.

Correlation Matrix: Squared table view showing the pair-wise correlation values of all columns. The color range varies from dark red (strong negative correlation), over white (no correlation) to dark blue (strong positive correlation). If a correlation value for a pair of column is not available, the corresponding cell contains a missing value (shown as cross in the color view).

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To use this node in KNIME, install the extension KNIME Extension for Apache Spark (legacy) 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: 5.2.0.v202311021430

On NodePit since: 2023-12-06

Last update: 2024-04-17

KNIME versions: Since v3.6

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