How to create a visualization ?

In order to make this section easy to understand, we’ll divide into 3 sub-sections:

• Choosing a visualization type
• Choosing an index
• Making the visualization

Choosing a visualization type

A visualization, as the name suggests, is the representation of your data in the form of a diagram of some sort (pie-chart, data table, heat map etc…)

In order to start creating your visualization, you need to decide on a visualization type. Usually the choice of a visualization type is an obvious choice since the user will have an idea of what it should look like.

Steps

1. Navigate to the Visualize dashboard. You can do so by clicking on the Visualize icon in the sidebar. It’s the second icon from the top.
2. Once you have the above open, click on the + icon to open up the visualization types panel.
3. Pick the visualization of your choice based on your preference.

How to choose an index ?

Before we choose an index, we need to understand the meaning of an index.

An index refers to a collection of JSON documents related to a particular data source (git, jenkins, slack, etc…). Every index will have an index-pattern that shows the different attributes in an index.

When creating your visualization, you will use fields from the index-pattern to generate your index-pattern

Making the visualization

We need to understand two important terms here, Buckets and Metrics

Metrics

Metrics in the visualization interface will refer to a single number for each aggregation you select. For example, Count will return the count of all the documents in the index.

Buckets

Bucket, as the name suggest, is different from metrics. It is different in the sense that It does not calculate metrics overs fields like metrics aggregation does. Instead they create buckets of document and each bucket is associated with a criterion which determines whether or not a document in the current context “falls” into it.

Now, let’s take an example.

We want to create a data table. The table should contain the name of the authors and their respective number of commits.

Steps

1. Navigate to the Visualize dashboard. It’s the second icon from the top in the sidebar.
2. Click on + because we want to crate a new visualization.
3. Choose data table because we want a table kind of visualization.
4. Regarding the index, we’ll go with git because we want to analyze commit information as mentioned above.

Once you’ve completed the above, you should be presented the following layout.

As you can see one metric aggregation is already set, Count which returned the number of document present in the index.

1. Now, we need to set out metrics. We need to gather all the documents in git. In order to do that, we can set up a Count aggregation that will return the total number of documents present in the index.

   

2. Now we need to set our buckets. We want to have every author with their respective number of commits. As such we’ll set our buckets to use the Terms aggregation and field, Author_name.

   

   Note: Press the play button at the top panel to visualize your changes.

You might notice that some fields are very similar. For example, Author_org_name and author_org_name. The latter is usually used in the current visualizations and is the one that should be used to build new visualizations.

1. So we got our visualization. Now we need to save it. Press on the Save button in the navigation bar just above the dashboard query bar. A popover will open and you’ll have to enter the name of your new visualization.

   

   Note: You need to be logged in to be able to save the visualization.

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