SVD Report Options

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Basic Analysis • Text Explorer • Latent Semantic Analysis (SVD) • SVD Report Options

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SVD Report Options

The SVD red triangle menu contains the following options:

SVD Scatterplot Matrix

Shows or hides a scatterplot matrix of the term and document singular value decomposition vectors. You are prompted to select the size of the scatterplot matrix when you select this option. This scatterplot matrix enables you to visualize more than the first two dimensions of the singular value decomposition. The Show Text button opens a window that contains the text of the selected documents.

Figure 11.195 SVD Scatterplots of Document and Term Spaces

Topic Analysis, Rotated SVD

Performs a varimax rotated partial singular value decomposition of the document term matrix to produce groups of terms called topics. You can select this option multiple times to find different numbers of topics. See Topic Analysis.

Shows or hides a hierarchical clustering analysis of the terms in the data. To the right of the dendrogram, there are options to set the number of clusters and save the clusters to a data table. For each term, this data table contains its frequency, the number of documents that contain it, and its assigned cluster.

Cluster Documents

Shows or hides a hierarchical clustering analysis of the documents in the data. To the right of the dendrogram, there are options to set the number of clusters, save the clusters to a column in the data table, and show the documents in a selected branch of the dendrogram plot.

Save Document Singular Vectors

Saves a user-specified number of singular vectors from the document singular value decomposition as columns to the data table.

Save Singular Vector Formula

Saves a vector-valued formula column containing the document singular value decomposition to the data table. The resulting column uses the Text Score() JSL function. For more information about this function, see Help > Scripting Index.

Save Term Singular Vectors

Saves a user-specified number of singular vectors from the terms singular value decomposition as columns to a new data table where each row corresponds to a term. If a Term Table data table is already open, this option saves the columns to that data table.

Removes the SVD report from the Text Explorer report window.

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Help created on 7/12/2018