Create Collection Column

This node aggregates multiple columns in a separate new column, whose type is a "collection type". The cells in the new column are typed collections of cells; that is, the content can be safely be split into the original column content. The reverse operation is available in the "Split Collection Column" node.

Options

Manual Selection

Include: This list contains the names of those columns in the input table to be included in the output table.
Exclude: This list contains the names of those columns in the input table to be excluded from the output table.
Filter: Use one of these fields to filter either the Include or Exclude list for certain column names or name substrings.
Buttons: Use these buttons to move columns between the Include and Exclude list. Single-arrow buttons will move all selected columns. Double-arrow buttons will move all columns (filtering is taken into account).
Enforce Exclusion: Select this option to enforce the current exclusion list to stay the same even if the input table specification changes. If some of the excluded columns are not available anymore, a warning is displayed. (New columns will automatically be added to the inclusion list.)
Enforce Inclusion: Select this option to enforce the current inclusion list to stay the same even if the input table specification changes. If some of the included columns are not available anymore, a warning is displayed. (New columns will automatically be added to the exclusion list.)

Wildcard/Regex Selection

: Type a search pattern which matches columns to move into the Include or Exclude list. Which list is used can be specified. You can use either Wildcards ('?' matching any character, '*' matching a sequence of any characters) or Regex. You can specify whether your pattern should be case sensitive.

Type Selection

: Select the column types that you want to include. Column types that are currently not present are depicted in italic.

Collection type

Create a collection of type 'set' (doesn't store duplicate values): If checked, a collection column of type set is created. Set collections contain only distinct values, duplicates are deleted.
ignore missing values: If checked, missing values are ignored, i.e. not stored in collection cells.

Output table structure

Remove aggregated columns from table: If checked, aggregated columns are removed from output table.
Enter the name of the new column: Specifies the name of the new column containing the collection cells.

Input Ports

: Any input data

Output Ports

: The input data along with a newly appended collection column.

Popular Predecessors

Popular Successors

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Workflows

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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:

v5.3

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

Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.3.3.v202410291553

On NodePit since: 2024-07-09

Last update: 2024-11-21

Tags: Streamable

KNIME versions: Since v3.6

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