1d34fc2d1a
Co-authored-by: Isabel Matwawana <isabel.matwawana@grafana.com> Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>
10 KiB
| aliases | description | keywords | labels | title | weight | refs | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Configure options for Grafana's bar chart visualization |
|
|
Bar chart | 100 |
|
Bar chart
A bar chart is a visual representation that uses rectangular bars, where the length of each bar represents each value. You can use the bar chart visualization when you want to compare values over different categories or time periods. The visualization can display the bars horizontally or vertically, and can be customized to group or stack bars for more complex data analysis.
{{< figure src="/static/img/docs/bar-chart-panel/barchart_small_example.png" max-width="1000px" alt="Bar chart" >}}
You can use the bar chart visualization if you need to show:
- Population distribution by age or location
- CPU usage per application
- Sales per division
- Server cost distribution
Configure a bar chart
The following video shows you how to create and configure a bar chart visualization:
{{< youtube id="qyKE9-71KkE" >}}
{{< docs/play title="Grafana Bar Charts and Pie Charts" url="https://play.grafana.org/d/ktMs4D6Mk/" >}}
Supported data formats
To create a bar chart visualization, you need a dataset containing one string or time field (or column) and at least one numeric field, though preferably more than one to make best use of the visualization.
The text or time field is used to label the bars or values in each row of data and the numeric fields are represented by proportionally sized bars.
Example 1
| Group | Value1 | Value2 | Value3 |
|---|---|---|---|
| uno | 5 | 3 | 2 |
If you have more than one text or time field, by default, the visualization uses the first one, but you can change this in the x-axis option as described in the Bar chart options section.
Example 2
If your dataset contains multiple rows, the visualization displays multiple bar chart groups where each group contains multiple bars representing all the numeric values for a row.
| Group | Value1 | Value2 | Value3 |
|---|---|---|---|
| uno | 5 | 3 | 2 |
| dos | 10 | 6 | 4 |
| tres | 20 | 8 | 2 |
While the first field can be time-based and you can use a bar chart to plot time-series data, for large amounts of time-series data, we recommend that you use the time series visualization and configure it to be displayed as bars.
We recommend that you only use one dataset in a bar chart because using multiple datasets can result in unexpected behavior.
Panel options
{{< docs/shared lookup="visualizations/panel-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Bar chart options
Use these options to refine your visualization.
X Axis
Specify which field is used for the x-axis.
Orientation
- Auto - Grafana decides the bar orientation based on what the panel dimensions.
- Horizontal - Will make the X axis the category axis.
- Vertical - Will make the Y axis the category axis.
Rotate x-axis tick labels
When the graph is vertically oriented, this setting rotates the labels under the bars. This setting is useful when bar chart labels are long and overlap.
X-axis tick label maximum length
Sets the maximum length of bar chart labels. Labels longer than the maximum length are truncated, and appended with ....
Bar labels minimum spacing
Sets the minimum spacing between bar labels.
Show values
This controls whether values are shown on top or to the left of bars.
- Auto Values will be shown if there is space
- Always Always show values.
- Never Never show values.
Stacking
Controls bar chart stacking.
- Off: Bars will not be stacked.
- Normal: Bars will be stacked on each other.
- Percent: Bars will be stacked on each other, and the height of each bar is the percentage of the total height of the stack.
Group width
Controls the width of groups. 1 = max with, 0 = min width.
Bar width
Controls the width of bars. 1 = Max width, 0 = Min width.
Bar radius
Controls the radius of the bars.
- 0 = Minimum radius
- 0.5 = Maximum radius
Highlight full area on cover
Controls if the entire surrounding area of the bar is highlighted when you hover over the bar.
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. To change the color, use the standard color scheme field option.
Gradient appearance is influenced by the Fill opacity setting.
None
No gradient fill. This is the default setting.
Opacity
Transparency of the gradient is calculated based on the values on the y-axis. 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 gradient mode
The Gradient mode option located under the Graph styles has a mode named Scheme. When you enable Scheme, the bar receives a gradient color defined from the selected Color scheme.
From thresholds
If the Color scheme is set to From thresholds (by value) and Gradient mode is set to Scheme, then the bar color changes as they cross the defined thresholds.
{{< figure src="/static/img/docs/time-series-panel/gradient_mode_scheme_thresholds_bars.png" max-width="1200px" caption="Color scheme: From thresholds" >}}
Gradient color schemes
The following image shows a bar chart with the Green-Yellow-Red (by value) color scheme option selected.
{{< figure src="/static/img/docs/time-series-panel/gradient_mode_scheme_bars.png" max-width="1200px" caption="Color scheme: Green-Yellow-Red" >}}
Tooltip options
{{< docs/shared lookup="visualizations/tooltip-options-1.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Legend options
{{< docs/shared lookup="visualizations/legend-options-1.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Text size
Enter a Value to change the size of the text on your bar chart.
Axis
Use the following field settings to refine how your axes display.
Some field options will not affect the visualization until you click outside of the field option box you are editing or press Enter.
Placement
Select the placement of the Y-axis.
Auto
Grafana automatically assigns Y-axis to the series. When there are two or more series with different units, then Grafana assigns the left axis to the first unit and right to the following units.
Left
Display all Y-axes on the left side.
Right
Display all Y-axes on the right side.
Hidden
Hide all axes.
To selectively hide axes, Add a field override that targets specific fields.
Label
Set a Y-axis text label.
If you have more than one Y-axis, then you can give assign different labels with an override.
Width
Set a fixed width of the axis. By default, Grafana dynamically calculates the width of an axis.
By setting the width of the axis, data whose axes types are different can share the same display proportions. This makes it easier to compare more than one graph’s worth of data because the axes are not shifted or stretched within visual proximity of each other.
Soft min and soft max
Set a Soft min or soft max option for better control of Y-axis limits. By default, Grafana sets the range for the Y-axis automatically based on the dataset.
Soft min and soft max settings can prevent blips from turning into mountains when the data is mostly flat, and hard min or max derived from standard min and max field options can prevent intermittent spikes from flattening useful detail by clipping the spikes past a defined point.
You can set standard min/max options to define hard limits of the Y-axis. For more information, refer to Standard options definitions.
{{< docs/shared lookup="visualizations/multiple-y-axes.md" source="grafana" version="<GRAFANA_VERSION>" leveloffset="+2" >}}
Standard options
{{< docs/shared lookup="visualizations/standard-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Data links
{{< docs/shared lookup="visualizations/datalink-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Thresholds
{{< docs/shared lookup="visualizations/thresholds-options-1.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Value mappings
{{< docs/shared lookup="visualizations/value-mappings-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}
Field overrides
{{< docs/shared lookup="visualizations/overrides-options.md" source="grafana" version="<GRAFANA_VERSION>" >}}