# 7.5. Analytic Commands¶

These commands are used to analyze data sets. Required parameters are indicated with a *.

See Configuring Cached Statistics for details on cached statistics.

## 7.5.1. stats-bounds¶

Display or calculate the bounds for the attributes of a schema.

Argument Description
-c, --catalog * The catalog table containing schema metadata
-f, --feature-name * The name of the schema
-q, --cql CQL to filter the features to consider
-a, --attributes Specific attributes to calculate bounds for
--no-cache Don’t use cached statistics

By default, pre-computed (cached) bounds will be displayed. The cached bounds may not be completely precise, but they are available instantly. If the --no-cache argument is used, the bounds will be calculated by running a query against the data. This will give a precise result, but take longer.

## 7.5.2. stats-count¶

Count features that match a predicate.

Argument Description
-c, --catalog * The catalog table containing schema metadata
-f, --feature-name * The name of the schema
-q, --cql CQL filter to select features to export
--no-cache Don’t use cached statistics

By default, pre-computed (cached) stats will be used to estimate the count. The cached stats may not be completely precise, but they are available instantly. If the --no-cache argument is used, the count will be calculated by running a query against the data. This will give a precise result, but take longer.

## 7.5.3. stats-histogram¶

Displays a histogram of the values of the given attributes.

Argument Description
-c, --catalog * The catalog table containing schema metadata
-f, --feature-name * The name of the schema
-q, --cql CQL filter to select features to export
-a, --attributes Specific attributes to calculate values for
--bins Number of bins used to divide the histogram values
--no-cache Don’t use cached statistics

The --bins argument will determine how the histogram is divided up. For example, when examining a week of time data, using 7 bins would group values by day.

By default, pre-computed (cached) stats will be used to estimate histograms. The cached stats may not be completely precise, but they are available instantly. If the --no-cache argument is used, the histogram will be calculated by running a query against the data. This will give a precise result, but take longer. Note that even with --no-cache, summary statistical models are used to determine histograms, and they may not be completely accurate.

Histograms on geometry-type attributes will displayed as rough heat maps.

## 7.5.4. stats-top-k¶

Displays the most common values for the given attributes.

Argument Description
-c, --catalog * The catalog table containing schema metadata
-f, --feature-name * The name of the schema
-q, --cql CQL filter to select features to export
-a, --attributes Specific attributes to calculate values for
-k Number of top values to show
--no-cache Don’t use cached statistics

By default, pre-computed (cached) stats will be used to estimate the top values. The cached stats may not be completely precise, but they are available instantly. If the --no-cache argument is used, the top values will be calculated by running a query against the data. This will give a precise result, but take longer. Note that even with --no-cache, summary statistical models are used to determine top values, and they may not be completely accurate.