Click reports (note that the RESULTS tab is grayed-out/disabled until after the analysis is completed).
Cluster Scoring > Results > Reports
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Clustering Scoring Report
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Iteration — When scoring, the algorithm performs only one iteration, so this value is always 1.
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Log Likelihood — This is the log likelihood value calculated using the scored data, giving a measure of the effectiveness of the model applied to this data.
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Diff — Since only one iteration of the algorithm is performed when scoring, this is always 0.
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Timestamp — This is the day, date, hour, minute and second marking the end of the scoring processing.
The Cluster Scoring report for Fast K-Means contains the Timestamp and Message columns, where the message indicates progress and a single iteration.