Line charts are useful when you want to see how your data changes or fluctuates, either over time, or when measured against a non-time dimension. Line charts can display your data series as either lines, bars, or both.
Line charts can plot a single dimension with up to 5 metrics, or 2 dimensions with a single metric.In this article:
Line charts vs. Time series
Line charts differ from Time series charts in the following ways:
- You can use any type of dimension as the X-axis in a Line chart. Time series only allow a Date or Date & Time dimension as the X-axis.
- Line charts based on Date or Date & Time dimensions will display gaps in the X-axis if those fields are missing data for the selected date range. By comparison, Time series provide a continuous X-axis of dates, and give you options on how to handle missing data.
- You can limit the number of data points displayed by the Line chart. Time series show all the data for the specified date range.
- Line charts don't display trendlines. Time series do.
Line chart example
You are launching a series of mobile apps and want to visualize the download and 7-day active metrics for the different product versions. Your data might look something like this:
|Product||Days Since Launch||Downloads||7-Day Active|
Here's a data source based on this data:
The following line charts show 2 ways you could visualize this data. Both charts use Days Since Launch as the primary X-axis dimension. The chart on the left shows the Downloads metric broken down by the Product dimension. The chart on the right shows both the Downloads and 7-Day Active metrics. The chart variation on the right could actually plot up to 5 metrics.
Configure the chart
Select the chart, then on the right, use the properties panel to configure the chart options.
The options in a chart's setup panel determine how the data is organized and displayed.
A data source provides the connection between the component and the underlying data set.
- To change the chart's data source, click the current data source name.
- To view or edit the data source, click . (You must have at least view permission to see this icon.)
- Click +BLEND DATA to see data from multiple data sources in the same chart. Learn more about data blending.
Dimensions are data categories. Dimension values (the data contained by the dimension) are names, descriptions or other characteristics of a category.
At least 1 dimension is required. The first dimension you specify serves as the primary data series in the chart. If you specify a breakdown dimension, the chart is limited to a single metric.
This option appears on charts that support it.
Drilling down gives viewers a way to reveal additional levels of detail within a chart. When you turn on the Drill down option, each dimension you add becomes another level of detail you can drill into. Learn more about chart drill down.
The Breakdown Dimension displays the metric data broken down according to the selected dimension. For example, a chart showing annual sales data could be broken down by a Sales Region dimension to show sales by region, or by an Employee ID dimension to show sales by sales associate.
Date range dimension
This option appears if your data source has a valid date dimension. For Google Ads and Analytics data sources, this option is automatically set to the Date dimension.
The Date range dimension is used as the basis for limiting the date range of the chart. For example, this is the dimension used if you set a date range property for the chart, or if a viewer of the report uses a date range control to limit the time frame.
Metrics measure the things contained in dimensions and provide the numeric scale and data series for the chart.
Metrics are aggregations that come from the underlying data set, or that are the result of implicitly or explicitly applying an aggregation function, such as COUNT(), SUM(), or AVG(). The metric itself has no defined set of values, so you can’t group by it, as you can with a dimension.
At least 1 metric is required. For charts with a single dimension, you can have up to 20 metrics. For charts with 2 dimensions, you can have 1 metric.
Set the default sort
The Sort and Secondary sort options in the chart's setup panel control the default sorting behavior. You can select any metric in the chart's data source, or any dimension that is currently displayed in the chart, to use as the primary or secondary sorting field.
Default date range
The Default date range property lets you set a timeframe for an individual chart.
Default date range options
|Auto||Use the default date range determined by the chart's data source.|
|Custom||Lets you use the calendar widget to select a custom date range for the chart.|
|Date compare type||Displays comparison data for the selected time period.|
Google Analytics segment
This option appears for charts based on a Universal Analytics data source.
A segment is a subset of your Analytics data. You can apply segments to your Looker Studio charts to help ensure that your Looker Studio and Google Analytics reports show the same data. Learn more about Analytics segments in Looker Studio.
Filters restrict the data that is displayed in the component by including or excluding the values you specify. Learn more about the filter property.
|Filter name||Click an existing filter to edit it. Mouse over the filter name and click X to delete it.|
|+Add a filter||Click this option to create a new filter for the chart.|
When interactions are enabled on a chart, that chart acts like a filter control. You can filter the report by clicking or brushing your mouse across the chart. Learn more about chart interaction filters.
A chart's style properties control the overall presentation and appearance of the chart.
This section controls how your data is colored. Learn more about coloring your data.
These options appear when you have a secondary (breakdown) dimension in your chart.
When checked, the data series are displayed in shades of a single color. Otherwise, the chart displays in a veritable rainbow of happy colors (depending on your report theme).
You can change the series colors using the color pickers below.
Use the current theme to color the data according to its position in the chart. This option emphasizes the ranking of the data over the identity of the data.
You can set specific colors using each data series' color picker.
Colors each dimension value in the chart with the color specified in the dimension value color map. This option ensures that your data uses color consistently, regardless of the position of that data in the chart.
This section repeats for each metric displayed in the chart. The order of sections matches the order of the metrics listed in the DATA tab.
|Line or Bars||Displays the data points for this series as a line or bar.|
|Line weight||Determines the thickness of line series.|
|Series color||Sets the color for the series line or bar.|
|Cumulative||When checked, data for this series is summed over time. Otherwise, the data is shown with no additional aggregation.|
|Show points||Displays individual data points on a line series. Viewers can mouse over a data point to display its value.|
|Show data labels||Displays individual values on for the data points in the series.|
|Compact Numbers||Turn on Show data labels to see this option:Rounds numbers and displays the unit indicator. E.g., 553,939 becomes 553.9K.|
|Decimal Precision||Turn on Show data labels to see this option:
Sets the number of decimal places in metric values.
|Smooth||Display series lines as curves.|
|Stacked bars||Display bars as stacked bars.|
|Number of points||Determines the number of data elements shown in the chart's X-axis. If the number of points selected is less than the number of values in the X-axis dimension, only the top N points will be shown (where N equals the number of points you've selected).|
|Number of series||Determines the number of secondary dimension series shown in the chart. If the number of series selected is less than the number of series in your data, only the top N series will be shown (where N equals the number of series you've selected). Remaining series will be grouped in an "other" category.|
These options control the display of the chart axes titles and scales. A right Y-axis section appears when you have more than 1 metric in your chart.
|Show axes||Shows or hides the chart axes.|
|Reverse Y-Axis direction||Controls the vertical display of the Y-axis.|
|Reverse X-Axis direction||Controls the horizontal display of the X-axis.|
|Show axis title||Shows or hides the axis labels.|
|Axis min and max||Set minimum and maximum values for the Y-axes.|
|Custom tick interval||Controls the interval between axis ticks.|
|Log scale||Makes the Y-axis scale logarithmic.l|
These options control the look of the chart grid.
|Axis color||Sets the color of the x-axis line.|
|Grid color||Sets the color of the grid lines.|
|Chart background||Sets the color of the chart background.|
|Chart border color||Sets the color of the inner chart border.|
Background and border
These options control the appearance of the chart background container.
|Background||Sets the chart background color.|
|Border Radius||Adds rounded borders to the chart background. When the radius is 0, the background shape has 90° corners. Border radius of 100° produces a circular shape.|
|Opacity||Sets the chart's opacity. 100% opacity completely hides objects behind the chart. 0% opacity makes the chart invisible.|
|Border Color||Sets the chart border color.|
|Border Weight||Sets the chart border line thickness.|
|Border Style||Sets the chart border line style.|
|Add border shadow||Adds a shadow to the chart lower and right borders.|
These options determine the placement of the chart legend.
|None||No legend appears|
|Right||Legend appears on the right.|
|Bottom||Legend appears on the bottom.|
|Top||Legend appears on the top.|
|Alignment||Sets the alignment of the legend relative to the selected position.|
|Max lines||Sets the number of lines used by the legend. If the number of series requires more lines, overflow items can be displayed by clicking the < and > arrows.|
The chart header lets viewers perform various actions on the chart, such as exporting the data, drilling up or down, and viewing the chart in the Explorer tool. Chart header options are:
|Show on hover (default)||Three vertical dots appear when you mouse over the chart header. Click these to access the header options.|
|Always show||The header options always appear.|
|Do not show||The header options never appear. Note that report viewers can always access the options by right clicking the chart.|
|Color||Set the color of the chart header options.|