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Pie Chartsedit
The slice size of a pie chart is determined by the metrics aggregation. The following aggregations are available for this axis:
- Count
- The count aggregation returns a raw count of the elements in the selected index pattern.
- Sum
- The sum aggregation returns the total sum of a numeric field. Select a field from the drop-down.
- Unique Count
- The cardinality aggregation returns the number of unique values in a field. Select a field from the drop-down.
The buckets aggregations determine what information is being retrieved from your data set.
Before you choose a buckets aggregation, specify if you are splitting slices within a single chart or splitting into multiple charts. A multiple chart split must run before any other aggregations. When you split a chart, you can change if the splits are displayed in a row or a column by clicking the Rows | Columns selector.
You can specify any of the following bucket aggregations for your pie chart:
- Date Histogram
- A date histogram is built from a numeric field and organized by date. You can specify a time frame for the intervals in seconds, minutes, hours, days, weeks, months, or years.
- Histogram
- A standard histogram is built from a numeric field. Specify an integer interval for this field. Select the Show empty buckets checkbox to include empty intervals in the histogram.
- Range
- With a range aggregation, you can specify ranges of values for a numeric field. Click Add Range to add a set of range endpoints. Click the red (x) symbol to remove a range.
- Terms
- A terms aggregation enables you to specify the top or bottom n elements of a given field to display, ordered by count or a custom metric.
- Filters
- You can specify a set of filters for the data. You can specify a filter as a query string or in JSON format, just as in the Discover search bar. Click Add Filter to add another filter.
- Significant Terms
- Displays the results of the experimental significant terms aggregation. The value of the Size parameter defines the number of entries this aggregation returns.
After defining an initial bucket aggregation, you can define sub-aggregations to refine the visualization. Click + Add Sub Aggregation to define a sub-aggregation, then choose Split Slices to select a sub-aggregation from the list of types.
When multiple aggregations are defined on a chart’s axis, you can use the up or down arrows to the right of the aggregation’s type to change the aggregation’s priority.
You can click the Advanced link to display more customization options for your metrics or bucket aggregation:
- Exclude Pattern
- Specify a pattern in this field to exclude from the results.
- Exclude Pattern Flags
- A standard set of Java flags for the exclusion pattern.
- Include Pattern
- Specify a pattern in this field to include in the results.
- Include Pattern Flags
- A standard set of Java flags for the inclusion pattern.
- JSON Input
- A text field where you can add specific JSON-formatted properties to merge with the aggregation definition, as in the following example:
{ "script" : "doc['grade'].value * 1.2" }
In Elasticsearch releases 1.4.3 and later, this functionality requires you to enable dynamic Groovy scripting.
The availability of these options varies depending on the aggregation you choose.
Select view options to change the following aspects of the table:
- Donut
- Display the chart as a sliced ring instead of a sliced pie.
- Show Tooltip
- Check this box to enable the display of tooltips.
- Show Legend
- Check this box to enable the display of a legend next to the chart.