Splunk® Enterprise

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Link graphs

Use link graphs to visualize the relationship between data values. Similar to a table, link graphs have rows and columns.

Each row contains nodes that represent a value or values. If there are multiple rows of the same value, the values group together in a single node.

The visual links connecting rows and columns represent the relationship between data values. Links will only show between adjacent columns in the visualization. You can rearrange the columns by adding the source option fieldOrder to the source code.

Generate a link graph

  1. Select the link graph using the visual editor by clicking the Add Chart button ( The Add Chart button in the editing toolbar. ) in the editing toolbar and either browsing through the available charts, or by using the search option.
  2. Select the graph on your dashboard so that it's highlighted with the blue editing outline.
  3. Set up a new data source by adding a search to the Search with SPL window if you are selecting a graph, or by clicking + Setup Primary Data Source if you've selected a shape.
  4. To select an existing data source, close the Configuration panel and reopen it. In the Data Configurations section, click +Setup Primary Data Source and click + Create Ad hoc Search to create a new search from this window. You can also choose a new ID that describes the search better than the default.

Configuration panel options

You can use the Configuration panel to configure the following link graph components.

Title

Give your visualization a name. This is also helpful when searching for individual visualizations in the dashboard definitions. This name is not the same as the automatically assigned unique ID.

Description

Give your visualization a description to explain what the user is viewing.

Data Configurations

You can choose one of the following data options:

  • An existing data source or create a new data source
  • A chain search
  • A saved search

Position & Size
You can use your mouse or the Position & Size section of the Configuration panel to change the size or location of the visualization for pixel-perfect sizing and placement.

Coloring

  • Background - Specify the color used for the background. The default for enterprise light is hexadecimal "#FFFFFF". The default for enterprise dark is hexadecimal "#000000".
  • Selected Node Color - Specify the color used to distinguish user selected nodes and the node's associated data flow.
  • Node Color - Specify the color used for each value in a column.
  • Link Color - Specify the color used for links between nodes.

Node Layout

  • Result Limit - Specify the limited number of nodes in each column.

Adjust the sizing of nodes and space with the following:

  • Node Width
  • Node Height
  • Vertical Spacing
  • Horizontal Spacing
  • Link Width

Display Options

  • Show Node Counts - Toggle on to see the number of nodes in each column.
  • Show Value Counts - Toggle on to see the individual count of each node.

Drilldown
Drilldown lets users click on a part of the graph to open an internal or external URL.

Code

Select your visualization or its search to view and edit the source code in real-time. You can also change the Visualization ID to a more readable ID to help identify this visualization in the source code.

Link graph example

The following link graph example bypasses the visual editor and directly sets the graph's data source in the source editor.

A link graph showing the relationship of foods between breakfast, lunch, and dinner.

Example data table

The table example demonstrates the data structure needed to generate a link graph.

Breakfast Lunch Dinner
cheese quiche souffle
croissant sandwich dinner roll
eggs frittata strata
eggs quiche strata
eggs custard egg tart
eggs shakshuka huevos rancheros

Source code

[...]
   "visualizations": {
       "viz_qb5GpdzC": {
           "type": "splunk.linkgraph",
           "dataSources": {
               "primary": "ds_linkgraph"
           },
           "options": {
               "nodeColor": "#f8be44",
               "linkColor": "#dc4e41",
               "resultLimit": 15,
               "nodeWidth": 340,
               "nodeHeight": 50,
               "nodeSpacingY": 20,
               "nodeSpacingX": 34,
               "linkWidth": 4
           }
       }
   },
   "dataSources": {
       "ds_linkgraph": {
           "type": "ds.test",
           "options": {
               "data": {
                   "columns": [
                       [
                           "cheese",
                           "croissant",
                           "eggs",
                           "eggs",
                           "eggs",
                           "eggs"
                       ],
                       [
                           "quiche",
                           "sandwich",
                           "frittata",
                           "quiche",
                           "custard",
                           "shakshuka"
                       ],
                       [
                           "souffle",
                           "dinner roll",
                           "strata",
                           "strata",
                           "egg tart",
                           "huevos rancheros"
                       ]
                   ],
                   "fields": [
                       {
                           "name": "Breakfast"
                       },
                       {
                           "name": "Lunch"
                       },
                       {
                           "name": "Dinner"
                       }
                   ]
               }
           }
       }
   },
 [...]

Source options for link graphs

Property Type Default Description
backgroundColor string > themes.defaultBackgroundColor Specify the color for the background. You may use a dataSource to apply the color. The default for enterprise light is "#ffffff". The default for enterprise dark is "#000000". The default for prisma dark is "#0b0c0e".
fieldOrder string > primary | getField() Specify the order of fields to be displayed in the link graph from left to right when loaded. Unspecified fields will be excluded from the graph.
linkColor string #6d6f76 Specify the color used for highlighted links. Unhighlighted links will be displayed at 20% opacity.
linkWidth number 1 Specify, in pixels, the stroke width of each link.
nodeColor string > themes.defaultNodeColor Specify the color used for unhighlighted nodes.
nodeTextColor string > nodeColor | maxContrast(nodeTextColorMaxContrast) Specify the color used for unhighlighted nodes text.
nodeHeight number 21 Specify, in pixels, the height of each node.
nodeHighlightColor string #7B56DB Specify the color used for highlighted nodes.
nodeTextHighlightColor string > nodeHighlightColor | maxContrast(nodeHighlightTextColorMaxContrast) Specify the color used for highlighted nodes text.
nodeSpacingX number 32 Specify, in pixels, the horizontal spacing between each node.
nodeSpacingY number 18 Specify, in pixels, the vertical spacing between each node.
nodeWidth number 180 Specify, in pixels, the width of each node.
resultLimit number 50 Specify the number of nodes rendered in each column.
showNodeCounts boolean TRUE Specify whether a count is shown for the number of nodes displayed in each column. The number of total nodes is also shown if there are hidden nodes.
showValueCounts boolean TRUE Specify whether a count is shown for the frequency of occurrence for each distinct node value.
Last modified on 26 July, 2022
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This documentation applies to the following versions of Splunk® Enterprise: 9.0.0, 9.0.1, 9.0.2


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