You can use a line chart (Pro) to visualize the results of multiple query statements. You can also configure personalized display settings on the Fields tab. This topic describes the basic configurations of a line chart (Pro).
Introduction
A line chart is used to analyze the value changes of a categorical variable over a continuous time range. In most cases, the analysis is based on a specified time range. You can intuitively view value trends. You can use a line chart to analyze the following change characteristics of values over a specified time range:
Increment or decrement
Increment or decrement rate
Increment or decrement pattern, such as periodicity
Peak value and bottom value
Line charts are the optimal choice for you to analyze value changes over a time range. You can also use a line chart to analyze the value changes of multiple fields in multiple lines over the same time range. Then, you can analyze the relationships between the fields. For example, the values of the fields are directly or inversely proportional to each other.
For more information about how to create a line chart, see Add a chart (Pro) to a dashboard.
Configurations on the Common Settings tab
You can configure global settings for a line chart on the Common Settings tab.
Parameters in the Basic Configurations section
Parameter
Description
Title
The title of the line chart.
Show Title
If you turn on Show Title, the title of the line chart is displayed.
Show Border
If you turn on Show Border, the borders of the line chart are displayed.
Show Background
If you turn on Show Background, the background color of the line chart is displayed.
Show Time
If you turn on Show Time, the time range of the query is displayed in the line chart.
Fixed Time
If you turn on Fixed Time, the time range of the query for the line chart is independent of the global time range of the dashboard.
Parameters in the Standard Configurations section
Parameter
Description
Format
The display format of numeric values.
Unit
The unit of numeric values.
Number of Digits after Decimal Point
The decimal places of numeric values.
Display Name
The name of the legend.
If you specify a value for Display Name, the value is used as the name for all items in the legend that is displayed in the line chart. If you want to change the name of an item in the legend, you must configure parameters on the Fields tab.
Color Scheme
The color scheme of the line chart. The color scheme is applied to the background and legend of the line chart.
Built-in: uses the built-in color scheme.
Solid: uses the color that you select.
Parameters in the Configure Query and Analysis section
Parameter
Description
Axis X Field
Select a field as the x-axis.
By default, Simple Log Service automatically selects an appropriate field as the x-axis.
Axis Y Field
Select a field as the y-axis.
By default, Simple Log Service automatically selects an appropriate field as the y-axis.
Parameters in the Data Configuration section
Parameter
Description
Data Completion
If you turn on Data Completion, Simple Log Service automatically replaces missing values with a specified value from the first data record within the time window specified by Completion window.
Completion window
The time window of data for which Simple Log Service automatically replaces missing values with a specified value. Minimum value: 0. Unit: seconds.
By default, Simple Log Service automatically specifies the value of Completion window.
Text-substituted Value
The value that you want to use to replace missing values. Default value: 0, which indicates that Simple Log Service replaces missing values with 0.
Parameters in the Legend Configurations section
Parameter
Description
Display Legend
If you turn on Display Legend, the legend of the line chart is displayed.
Legend
The position of the legend in the line chart.
Actions
The data display effect that you want to achieve when you click a legend item.
Single: When you click a legend item, only the data that corresponds to the legend item is displayed in the line chart.
Switch: When you click a legend item, the data that corresponds to the legend item is hidden or displayed in the line chart.
Maximum Width (Height)%
The maximum width and height of the legend.
Parameters in the Tooltip Configurations section
Parameter
Description
Sorting Order
The sorting method of data.
Parameters in the Axis X section
Parameter
Description
Display Axis X
If you turn on Display Axis X, the x-axis of the line chart is displayed.
Axis X Title
The title of the x-axis.
Axis X Height
The height of the x-axis.
By default, Simple Log Service automatically specifies the height of the x-axis.
Parameters in the Axis Y section
Parameter
Description
Display Axis Y
If you turn on Display Axis Y, the y-axis of the line chart is displayed.
Axis Y Title
The title of the y-axis.
Axis Y Position
The position of the y-axis.
Axis Y Width
The width of the y-axis.
By default, Simple Log Service automatically specifies the width of the y-axis.
Max Value
The maximum value of the y-axis.
By default, Simple Log Service automatically specifies the maximum value of the y-axis.
Minimum
The minimum value of the y-axis.
By default, Simple Log Service automatically specifies the minimum value of the y-axis.
Elastic Maximum Value
The elastic maximum value of the y-axis. The elastic maximum value takes effect only when all values of the y-axis are less than the elastic maximum value.
By default, Simple Log Service automatically specifies the elastic maximum value of the y-axis.
Elastic Minimum Value
The elastic minimum value of the y-axis. The elastic minimum value takes effect only when all values of the y-axis are greater than the elastic minimum value.
By default, Simple Log Service automatically specifies the elastic minimum value of the y-axis.
Axis Y ID
The ID of the y-axis. This parameter does not take effect if you configure only one y-axis on the Common Settings tab. If you want to configure multiple y-axes, you must configure parameters on the Fields tab. The ID of the y-axis is a string. A y-axis that uses a specified ID represents a unique y-axis in a line chart. For more information, see Create a line chart with multiple y-axes.
The configuration of the ID for the y-axis takes precedence over the unit that you specify in the Standard Configurations section. For example, if two y-axes use the same unit, the two y-axes are merged into one y-axis. If two y-axes use the same unit but different IDs, they are displayed as two y-axes.
Parameters in the Chart Configurations section
Parameter
Description
Chart Type
The type of the line chart.
Connection Mode
The connection mode of the line in the line chart.
Connector Width
The width of the line.
Show Points
Specifies whether to display points in the line chart.
Transparency
The transparency of the line chart.
Point Size
The size of each point in the line chart.
Gradient Mode
The gradient mode of the line chart.
Transparency: If you select this mode, the line chart uses a color gradient that is affected by the line color and the value of Transparency.
No Gradient: If you select this mode, the line chart does not use a color gradient. The line color is used in the line chart.
Parameters in the Replace Variable section
Parameter
Description
Replace Variable
The settings of variable replacement. You can click AddReplace Variable to add a filter of the Replace Variable type to a single chart. After you configure the settings of variable replacement on the Common Settings tab, Simple Log Service adds a filter in the upper-left corner of the chart. You can select a value from the filter drop-down list. After you select a value, Simple Log Service automatically replaces the variable in the query statement of the chart with the variable value indicated by the value that you select, and performs a query and analysis operation. For more information, see Example 2: Configure variable replacement.
Parameters in the Documentation section
Parameter
Description
Add Documentation Link
The button that allows you to specify custom document links and descriptions. After you configure the settings, the specified information is displayed in the upper right corner of the line chart.
Configurations on the Fields tab
You can configure personalized display settings for the results of a single query statement or for a single column of data in the results. For more information about the parameters on the Fields tab, see Configurations on the Common Settings tab.
For example, in the A > pv section, you can configure settings for the pv field in the results of Query Statement A. In the B section, you can configure settings for the results of Query Statement B. In the following figure, the green line indicates the pv field in the results of Query Statement A, and the blue line indicates the results of Query Statement B. You can set Connector Width to 6 for the green line and 2 for the blue line.
Configurations on the Interaction Occurrences tab
Drill-down events are used to analyze a single field or the results of a single query statement from a finer-grained dimension. Drill-down events include events to open a Logstore, open a saved search, open a dashboard, open trace analysis, open trace details, and customize an HTTP link. For more information, see Drill-down events
For example, in the A > pv section, you can configure an Open Logstore drill-down event for the pv field in the results of Query Statement A. After you configure the event, you can click a point on the green line of the line chart and click Open Logstore. Then, you are navigated to the Logstore that you specify.
