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