The workflow iterates over all numeric columns and negates the values in the column. The loop takes one column at a time, renames the column name to ANONYMOUS_COLUMN in the first rename node, changes the value in the math formula nodes and reverts the name to the original column name.
Workflow 
Looping over all columns and manipulation of each
Used extensions & nodes
Created with KNIME Analytics Platform version 3.1.0
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KNIME GmbH, Konstanz, Germany
Version 3.1.0
- Go to item
KNIME GmbH, Konstanz, Germany
Version 3.1.0
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