Create an overlay chart and explore visualization options
In this example, you create a chart that overlays two data series as lines over three data series as columns. The overlay chart will show the Actions and the Conversion Rates.
You will use the
stats command to count the user actions. The
eval command is used to calculate the conversion rates for those actions. For example, how often someone who viewed a product also added the product to their cart.
This example uses the
productName field from the Enabling field lookups section of this tutorial. You must complete all of those steps before continuing with this section.
- Start a new search.
- Change the time range to All time.
- Run the following search.
sourcetype=access_* status=200 | stats count AS views count(eval(action="addtocart")) AS addtocart count(eval(action="purchase")) AS purchases by productName | eval viewsToPurchases=(purchases/views)*100 | eval cartToPurchases=(purchases/addtocart)*100 | table productName views addtocart purchases viewsToPurchases cartToPurchases | rename productName AS "Product Name", views AS "Views", addtocart as "Adds To Cart", purchases AS "Purchases"
evalcommand is used to define two new fields. These fields contain the conversion rates.
- The viewToPurchases field calculates the number of customers who viewed the product to the number of customers who purchased the product. The calculation returns a percentage.
- The cartToPurchases field calculates the number of customers who added the product to their cart to the number of customers who purchased the product. The calculation returns a percentage.
- Click the Visualization tab.
This is the same chart in the section Create a basic chart, with two additional data series, viewsToPurchases and cartToPurchases.
Notice that the labels on the X-Axis are truncated. Because there are so many products, the labels are truncated making them difficult to read. Let's fix that.
- Click Format and X-Axis.
- Look at the numbers on the Y-Axis. The numbers range from 1000 to 3000. Click Format and Y-Axis.
To make the chart easier to read, add a title and specify different number intervals on the Y-Axis.
- Look at the legend. It shows that some of the columns represent actions such as Views and Purchases, and some columns represent conversion rates such as viewsToPurchases. The actions are counts of the values in specific fields. The conversion rates are percentages. These two types of information should be shown separately.
- To fix this issue, click Format and Chart Overlay.
To separate the actions from the conversion rates, you can overly one set of values over another set of values. In this example you will overlay the conversion rates, as lines, over the actions, which will remain as columns.
- For Overlay, click inside the box. Begin and select viewsToPurchase. Click inside the box again and select cartToPurchase. This identifies the two series that you want to overlay on to the column chart.
- For View as Axis, click On.
- For Title, choose Custom
- For Scale, click Linear.
- For the Interval type
20. For the Max Value type
- Close the Format dialog box. Notice that the conversion rates now appear as lines in the chart.
The axis on the right side of the chart is called a second Y-Axis. The label and values for the line series appear on this axis.
- In the Save Report As dialog box, for Title type
Comparison of Actions and Conversion Rates by Product.
- For Description, type
The number of times a product is viewed, added to cart, and purchased and the rates of purchases from these actions.
Create a basic chart
Create a report from a custom chart
This documentation applies to the following versions of Splunk® Enterprise: 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.2.0, 7.2.1, 7.2.2, 7.2.3