Constant Value Column Filter

This node filters columns exclusively containing duplicates of the same value from the input data table. Examples include a column containing only zeroes, a column containing only identical Strings, or a column comprising only missing cells. In a dialog window, you can select which columns to apply the filter to (with all columns selected by default). From these selected columns, you can choose to remove either all constant value columns or columns containing only specific constant numeric, String, or missing values. Finally, you can also specify the minimum number of rows a table must have to be considered for filtering.

Options

Remove from the selected columns

Choose whether to remove all constant value columns or only those containing a specific value.

• all constant value columns: Remove all constant value columns from the columns considered for filtering, independent of the specific value they contain in duplicates.
• constant value columns that only contain: Remove only those constant value columns from the columns considered for filtering that only contain a certain specific value.

numeric values of

Remove only those constant value columns that only contain a certain specific numeric value.

string values of

Remove only those constant value columns that only contain a certain specific textual value.

missing values

Remove only those constant value columns that only contain empty cells / missing values.

Considered columns

This list contains the column names of the input table that are to be considered for filtering.

Minimum number of rows

The minimum number of rows a table must have to be considered for filtering. If the table size is below the specified value, the table will not be filtered / altered.

Views

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Workflows

• 00_Topic_Modeling_with_Verified_ComponentsKNIME Hub
• 00_Topic_Modeling_with_Verified_ComponentsKNIME Hub
• 01_Column_Row_FilteringKNIME Hub
• 01_Guided_Analytics_for_ML_AutomationKNIME Hub
• 01_Guided_Analytics_for_ML_AutomationKNIME Hub
• Show all 127 workflows

Links

• Formula to check if all data in a single column have the same valueby HansS on 2024-07-10

  forum.knime.com/p/262879

Developers