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Harmony in Flow can be invoked in Normalization and scaling in Batch removal section only if 1) the data has some categorical attributes (only categorical attributes can be included in the model); and 2) PCA data node is selected (Figure 1).

Figure 1. Harmony task in Normalization and scaling in Batch removal section in Flow.

To run Harmony, 

• Click a PCA data node
• Click the Normalization and scaling section Batch removal section in the toolbox
• Click Harmony

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