# Workspace Node: Elasticsearch Text Analysis Results-Concept Extraction Tab

In the Elasticsearch Text Analysis node dialog box, under the Results heading, select Concept Extraction tab to access the following options.

For more information, see Singular Value Decomposition in Statistica Text Mining and Document Retrieval for further details on computation.

Option | Description
--- | ---
Concept Extraction | Select this option to compute the singular value decomposition of the term-documents matrix. Options available for reviewing the coefficients and document scores are available (not dimmed).
Scree plot | Select this option to create a scree plot of singular values that are extracted from the term-documents matrix. This plot is useful for determining the number of singular values that are useful and informative, and that should be retained for subsequent analysis.
Singular values | Click this button to produce a results spreadsheet with the singular values as computed and selected.
Document scores | Click this button to generate a results spreadsheet with the document scores like the word coefficients. These can be plotted in 2D or 3D scatterplots to aid in the interpretation of the semantic space defined by the extracted words and documents in the analysis.
Word
Coefficient | Click this button to produce a results spreadsheet with word coefficients.
Importance | Click this button to display the word importance values computed from the singular value decomposition.
Residuals | Click this button to display the sum of squares of word residuals from the singular value decomposition.

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