Line chart widgets

[ 1 What data do I need for this widget? ] [ 2 Widget settings ] [ 3 Tips for using a line chart ] [ 4 Query example ]

The line chart widget draws a standard line chart where the x-axis is always time. Use this to plot one or several series of data points over the same time period to create a line or lines. These are useful when you want to analyze how a single entity has changed over time, or to compare the evolution of similar groups over time.

What data do I need for this widget?

If the source query groups events, it must also contain an aggregated value for each group (a count, average, maximum, mean, etc.).

If the source query does not group events, you will have to choose the metric to use for the y-axis. This is done in the widget's visual settings.

Events grouped by time and a second or third grouping element will be capable of plotting multiple lines over the selected time range.

Widget settings

To edit the widget settings, you must first be in Edit mode.

Click the widget title bar to open its settings. Alternatively, the settings are accessible via the Ellipsis icon → Properties. The widget settings are contained in three tabs, Data, Visual, and Raw.

The settings in the Data and Raw tabs are described in the Create a widget article. These are the Visual settings for the line chart:

Category	Setting	Description

Category	Setting	Description
Fields	X-Axis	This will default to the eventdate field making the x-axis a timeline. You can change this by selecting a different field.
	Y-Axis (Number)	This is the field whose values are used to plot the y-axis. It must be a metric.
	Series	Choose a field here that will be used to plot multiple lines in the chart. When plotting multiple series on a line chart, use the Max Series setting to specify a maximum number of series.
Fill Gaps	Fill Gaps	If your query has a grouping clause, there will be periods of time where no data is received. You can decide how to draw this point: as null - leaves the empty values as null and they do not have nodes representing them on the chart as zero - plots the empty values as zero and they have nodes representing them on the chart connected - represents on the chart a line that connects each of the nodes with values, bypassing those without them.
General	Inverted	Toggle ON to invert the Y-axis.
	Max Series	This is the maximum number of lines to plot on the chart. This is done to avoid overcrowding and to maintain readability. Max series - specify a maximum number of series. Ascending/descending - select whether to sort from ascending or descending order. Maximum values - to avoid overcrowding and improve appearance, you can select different options to display data on the chart: Maximum values Minimum values Number of events Sum of events
	Default Type	This is the style of line chart to apply. The list of options includes Line, Spline, Column, Area, and Area + Spline. All of these chart types are plotted using an X and Y axis and this setting lets you switch between different styles to apply the one the best suits your data. Spline is selected by default when you create this type of widget.
Axis Properties	X-Axis	For each field that contributes to the x-axis, enter a Title and data Type. The Title is simply a label to display for the axis. The Type that you select here will be applied to the values used for the x-axis. In a datetime axis, the numbers are given in milliseconds, and tick marks are placed on appropriate values like full hours or days. In a category axis, the point names of the chart's series are used for categories. Linear is useful in situations where there is a direct correlation between variables. With this option, the x-axis displays a scale with a uniform distribution of its values. Logarithmic is useful when there are enormous differences in group values making it difficult to display the data. This changes the scale of the x-axis so that the ticks from left to right represent larger value jumps.
Axis Properties	Y-Axis	For each field that contributes to the y-axis, enter a Title and data Type. The Title is simply a label to display for the axis. The Type that you select here will be applied to the values used for the y-axis. In a datetime axis, the numbers are given in milliseconds, and tick marks are placed on appropriate values like full hours or days. In a category axis, the point names of the chart's series are used for categories. Logarithmic is useful when there are enormous differences in group values making it difficult to display the data. This changes the scale of the y-axis so that the ticks from bottom to top represent larger value jumps. You can decide the maximum and minimum values to be displayed in the y-axis in the Max displayed and Min displayed fields. If you don't enter any value, the limits will be automatically calculated.
Series	For each data series, this group of settings enable you to customize their individual characteristics.
	ID	Unique, internal identifier for this data series.
	Name	The label for the series. This will appear in the tooltip and in the chart legend.
	Color	Select the color for the data series.
	Line Width	This is the width of the line in pixels.
	Type	Select display style for the selected series. Choose from Line, Spline, Column, Area, and Area + Spline.
	Dash Style	Choose a dashed line style for the selected data series.
Legend	Horizontal alignment	Select the horizontal alignment of the legend that indicates the different series. Choose center, right or left.
	Vertical alignment	Select the vertical alignment of the legend. Choose bottom, top or middle.
	Legend layout	Select the layout alignment of the legend. Choose horizontal or vertical.
	Size	The range of values (from 16px to 320px).

Tips for using a line chart

Here are a few tips to get the most out of your line chart:

Move your mouse over the chart to display a tooltip that contains detailed information about the series plotted in the chart.
Click and drag across a section of the chart to zoom to the time period in the chart. Click Reset zoom to go back to the default view.
Hover over a data series in the chart legend to dim the rest of them down in the chart or click it to hide it or show it. You can also click the Hide all Series / Show all series button at the top right corner to hide / show all the series in the chart.

Query example

This is the source query used and the fields mapped to generate the widget shown above:

query(
from demo.ecommerce.data
group every 5m by str(statusCode), method, protocol
select count() as count
)

X-axis	eventdate
Y-axis	count
Series	statusCode