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Corpus manager

Corpus statistics

This menu entry gathers a summary table of descriptive statistics for the currently selected corpus. The statistics table will be shown in the Results table view.


The corpus statistics table for the ALICE corpus.

The columns Table and Column of the table identify the output table and output column as shown in the Output columns tree. The column Entries shows the total number of entries in that table column, including duplicate entries. The number of unique values is shown in Uniques.

The column Uniqueness ratio is calculated as the number of unique values divided by the number of entries. The values can range from just above 0.0 to 1.0. A uniqueness ratio of 1.0 indicates that every value in the table column occurs exactly once. In the example above, this is the case for the column Filename from the Files table: each text file has exactly one entry in the Files table.

The inverse of the uniqueness ratio is given in the column Average frequency. The value in this column expresses the average number of repetitions of each entry in the corresponding table column. For example, the column FileId from the table Column has an average frequency of 2770.167, which means that on average, there are 2770 tokens associated with each file, or in other words, each file consists of 2770 tokens on average.

For corpus statistics tables, no Aggregations are available. The content of the table can be saved by using the entries from the File menu.


The Corpus statistics table replaces your current query results table. If your last corpus query took a long time to complete, you may want to save the result table before gathering the corpus statistics.

Corpus documentation

This menu entry opens the website for the currently selected corpus. On this website, you may find additional information on the structure of the corpus. For example, the website may contain an explanation of the labels used as part-of-speech tags.