Histogram Panel
The histogram panel provides a binned display of queries per time interval, using Solr’s range facets for data.
Configuration Options
Mode
The value for the y-axis. The options are count or values.
When choosing values, you must select a field to use as the basis for the values. This field must have a numeric field type. You can also select a Group By Field, which cannot be a multi-valued field, and creates multiple charts.
Time_field
The value for the x-axis. This is the field to use for display of the time information for the histogram.
Chart Settings
There are several chart settings.
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Bars: Enable to show bars on the chart.
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Lines: Enable to show lines on the chart. When enabled a few more settings will be available:
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Line Fill: The fill area, from 0-10.
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Line Width: The width of the lines, in pixels.
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Smooth: Enable to remove 0 values from lines.
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Points: Enable to show points on the chart.
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Stack: Enable to stack multiple series together.
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Percent: Enable to show the stack as a percentage of the total (only displayed when stack is enabled).
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Legend: Enable to show the legend.
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xAxis: Enable to display the x-axis values.
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yAxis: Enable to display the y-axis values.
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Time correction: If time correction should be applied to use the browser’s timezone. Select 'utc' to always display times in UTC.
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Selectable:
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Zoom Links: Enable to allow users to zoom out in time.
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View Options: Enable to show an options section.
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Auto-interval: Enable to allow the chart to automatically scale the intervals.
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Resolution: When Auto-interval is enabled, a best effort will be made to show this number of bars.
Tooltip Settings
The tooltip settings control the display of data when users hover over a line or bar on the chart.
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Stacked Values: When using stacked values, this defines if the data be displayed as cumulative, or as individual values.
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Display Query: If an alias is set, it will be shown in the tooltip. If no alias is set, enable this to show the entire query.