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Cluster Analysis

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I have applied K-Centroids Cluster Analysis. I have selected several fields, z-score as standardize method, K-mean method, number of cluster and starting point but I keep receive the error message:

Tool#27: Tool #6: No valid fields were selected!

 

What went wrong?

Alteryx Certified Partner

Sometimes it's helpful to open the tool so the error can be better understood. The K-Centroids Cluster Analysis tool is a macro that you can right click and open. In this case  the error occurs at a tool that builds the reporting output. 

 

I just did some testing and I produced this error when I input variables that have no variation. The variables are valid,  numeric types, but fail to produce any results from this analysis which breaks the reporting tools. Make sure your variables are linearly independent.