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* Added Config options heading and bumped other heading levels * Restructured Histogram options and fixed tooltip options level * Created tooltip 3 shared file and updated tooltip 1 file * Replaced shared file in 3 visualizations * Wording fix * Fixed wording
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Configure options for Grafana's histogram visualization |
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Histogram | 100 |
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Histogram
Histograms calculate the distribution of values and present them as a bar chart. Each bar represents a bucket; the y-axis and the height of each bar represent the count of values that fall into each bucket, and the x-axis represents the value range.
For example, if you want to understand the distribution of people's heights, you can use a histogram visualization to identify patterns or insights in the data distribution:
{{< figure src="/static/img/docs/histogram-panel/histogram-example-v8-0.png" max-width="1025px" alt="A histogram visualization showing the distribution of people's heights" >}}
You can use a histogram visualization if you need to:
- Visualize and analyze data distributions over a specific time range to see how frequently certain values occur.
- Identify any outliers in your data distribution.
- Provide statistical analysis to help with decision-making
Configure a histogram visualization
After you've created a dashboard, the following video shows you how to configure a histogram visualization:
{{< youtube id="QfJ480j9-KM" >}}
{{< docs/play title="Histogram Examples" url="https://play.grafana.org/d/histogram_tests/" >}}
Supported data formats
Histograms support time series and any table results with one or more numerical fields.
Examples
The following tables are examples of the type of data you need for a histogram visualization and how it should be formatted.
Time-series table
| Time | Walking (km) |
|---|---|
| 2024-03-25 21:13:09 | 37.2 |
| 2024-03-25 21:13:10 | 37.1 |
| 2024-03-25 21:13:10 | 37.0 |
| 2024-03-25 21:13:11 | 37.2 |
| 2024-03-25 21:13:11 | 36.9 |
| 2024-03-25 21:13:12 | 36.7 |
| 2024-03-25 21:13:13 | 36.3 |
The data is converted as follows:
{{< figure src="/static/img/docs/histogram-panel/histogram-example-time-series.png" max-width="1025px" alt="A histogram visualization showing the random walk distribution." >}}
Basic numerical table
| Gender | Height (kg) | Weight (lbs) |
|---|---|---|
| Male | 73.8 | 242 |
| Male | 68.8 | 162 |
| Male | 74.1 | 213 |
| Male | 71.7 | 220 |
| Male | 69.9 | 206 |
| Male | 67.3 | 152 |
| Male | 68.8 | 184 |
The data is converted as follows:
{{< figure src="/static/img/docs/histogram-panel/histogram-example-height-weight.png" max-width="1025px" alt="A histogram visualization showing the male height and weight distribution" >}}
Configuration options
{{< docs/shared lookup="visualizations/config-options-intro.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Panel options
{{< docs/shared lookup="visualizations/panel-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Histogram options
Use the following options to refine your histogram visualization.
| Option | Description |
|---|---|
| Bucket count | Specifies the number of bins used to group your data in the histogram, affecting the granularity of the displayed distribution. Leave this empty for automatic bucket count of 30. |
| Bucket size | The size of the buckets. Leave this empty for automatic bucket sizing (~10% of the full range). |
| Bucket offset | If the first bucket should not start at zero. A non-zero offset has the effect of shifting the aggregation window. |
| Combine series | This will merge all series and fields into a combined histogram. |
| Stacking | Controls how multiple series are displayed in the histogram. Choose from the following:
|
| Line width | Controls line width of the bars. |
| Fill opacity | Controls the fill opacity bars. |
| Gradient mode | Set the mode of the gradient fill. Fill gradient is based on the line color. |
Bucket offset
If the first bucket should not start at zero, a non-zero offset has the effect of shifting the aggregation window.
For example, 5-sized buckets that are 0-5, 5-10, 10-15 with a default 0 offset would become 2-7, 7-12, 12-17 with an offset of 2; offsets of 0, 5, or 10, in this case, would effectively do nothing.
Typically, this option would be used with an explicitly defined bucket size rather than automatic. For this setting to affect, the offset amount should be greater than 0 and less than the bucket size; values outside this range have the same effect as values within this range.
Gradient mode
Set the mode of the gradient fill. Fill gradient is based on the line color. To change the color, use the standard color scheme field option.
Gradient display is influenced by the Fill opacity setting.
Choose from the following:
- None - No gradient fill. This is the default setting.
- Opacity - Transparency of the gradient is calculated based on the values on the Y-axis. The opacity of the fill is increasing with the values on the Y-axis.
- Hue - Gradient color is generated based on the hue of the line color.
- Scheme - The selected color palette is applied to the histogram bars.
Tooltip options
{{< docs/shared lookup="visualizations/tooltip-options-3.md" source="grafana" version="<GRAFANA_VERSION>" leveloffset="+1" >}}
Legend options
{{< docs/shared lookup="visualizations/legend-options-1.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Standard options
{{< docs/shared lookup="visualizations/standard-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Data links and actions
{{< docs/shared lookup="visualizations/datalink-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Value mappings
{{< docs/shared lookup="visualizations/value-mappings-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Thresholds
{{< docs/shared lookup="visualizations/thresholds-options-2.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Field overrides
{{< docs/shared lookup="visualizations/overrides-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}