FarthestFirst (3.7)

Cluster data using the FarthestFirst algorithm. For more information see: Hochbaum, Shmoys (1985)

A best possible heuristic for the k-center problem.Mathematics of Operations Research.

10(2):180-184.

Sanjoy Dasgupta: Performance Guarantees for Hierarchical Clustering.In: 15th Annual Conference on Computational Learning Theory, 351-363, 2002.

Notes:

- works as a fast simple approximate clusterer- modelled after SimpleKMeans, might be a useful initializer for it

(based on WEKA 3.7)

For further options, click the 'More' - button in the dialog.

All weka dialogs have a panel where you can specify classifier-specific parameters.

Options

FarthestFirst Options

N: number of clusters. (default = 2).

S: Random number seed. (default 1)

Preliminary Attribute Check

The Preliminary Attribute Check tests the underlying classifier against the DataTable specification at the inport of the node. Columns that are compatible with the classifier are marked with a green 'ok'. Columns which are potentially not compatible are assigned a red error message.

Important: If a column is marked as 'incompatible', it does not necessarily mean that the classifier cannot be executed! Sometimes, the error message 'Cannot handle String class' simply means that no nominal values are available (yet). This may change during execution of the predecessor nodes.

Capabilities: [Nominal attributes, Binary attributes, Unary attributes, Empty nominal attributes, Numeric attributes, Date attributes, Missing values, No class] Dependencies: [] min # Instance: 1

Command line options

It shows the command line options according to the current classifier configuration and mainly serves to support the node's configuration via flow variables.

Input Ports

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Training data

Output Ports

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Trained model

Popular Predecessors

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Popular Successors

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Views

Weka Node View
Each Weka node provides a summary view that provides information about the classification. If the test data contains a class column, an evaluation is generated.

Workflows

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Links

Developers

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Installation

To use this node in KNIME, install the extension KNIME Weka Data Mining Integration (3.7) from the below update site following our NodePit Product and Node Installation Guide:

v5.3

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

Plugin provider: KNIME AG, Zurich, Switzerland
Plugin version: 5.3.0.v202312081535
On NodePit since: 2024-07-09
Last update: 2024-11-14
KNIME versions: Since v3.6

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