The following node is available in the Open Source KNIME predictive analytics and data mining platform version 2.7.1. Discover over 1000 other nodes, as well as enterprise functionality at http://knime.com.

Group Loop Start

Group loop start, each iteration processes another group of rows. The column(s) to group on need to be specified. The input data table is sorted based on the specified columns before looping starts, by default. Sorting can be switched off if input data table is already properly sorted based on the columns to group on. If sorting is switched off, but input table is not properly sorted execution will be canceled.

Dialog Options

Column selection
The columns used to identify the groups.
Input is already sorted by group column(s)
If checked, the input data table will not be sorted before looping starts. The table must already be sorted properly by the columns to group on. If sorting is switched off, but input table is not properly sorted execution will be canceled.

Ports

Input Ports
0 Any input table. Each iteration will process one group of this table.
Output Ports
0 The current group of the input table.
This node is contained in KNIME Base Nodes provided by KNIME GmbH, Konstanz, Germany.