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Radar Chart Widget (BX)

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About the Radar Chart

A Radar Chart (also often called a “spider chart”) is a two-dimensional chart designed to plot one or more series of quantitative values. The chart provides an axis for each value present in the survey, arranged radially as equi-angular spokes around a central point.

Radar chart with fake brand names around the edges. Circles inside one another like a bullseye, represnting values on a scale. The colored regions represent how values differ for each spoke (AKA brand)

Interpretation

Radar charts are best for showing how different subjects rate on the same scale.

Example: See how 5 brands’ average NPS scores compare.

Because of this, radar charts are best for plotting finite numeric data, such as a scale from 1-10, rather than numeric fields with structureless or infinite values, like age or number of responses. Negative values also do not work well with radar charts.

The center of the circle represents zero, and the radius of the circle (the size it stretches in any direction from the center) generally represents the highest end of the scale. Although it’s more subjective, you can also set the radius to a value closer to the highest gathered data point so far.

Each spoke on the circle represents a different data point. In the example below, the spokes are the fictional brands WeVS, Gartells, Jones, Wallblue, and MiniRX.

Spider chart with one blue blob of color in the middle

Data Requirements

The Radar Chart works well when you have multiple sets of the same question with the same numeric scale. For example, you may ask “How likely are you to make a purchase from _?” separately about each brand you are researching, and ask respondents to rate their answer a seven point scale from “Extremely likely” to “Extremely unlikely.”

This means your survey needs one of the following:

Example: Based on how you completed your Brand Tracker setup, you are likely to have a separate NPS question for each brand you are researching, bundled together in a Measure Group. This is perfect for the Radar Chart.

NPS Questions, named by the brand they cover, mapped into a dashboard's data

Qtip: Technically, you can add many other kinds of data to a radar widget, including Numeric and Count-based fields. But radar charts are best for displaying data from sets of identical questions set on finite number scales.

Mapping Data for a Radar Chart

If you don’t want to use the NPS field included by default, these instructions can help you map your custom survey questions.

  1. Add a new Field Group to your data.
    Inside dashboard data page. Bottom-left is a blue add field group button. Opens a new window where you name the group and choose the type
  2. Make it a Measure Group.
  3. Add each of your similarly scaled questions to it. (This means the multiple choice questions, the NPS questions, or the matrix table rows.)
    Add field to group button is indented under the field group. We see a table of fields, just rows and rows of NPS questions by brand
  4. Make sure each of these fields inside the group is a Number Set.

Setting Up your Radar Chart

Once you have the right data mapped, adding data to your widget is easy.

  1. Select Add Metric.
    Double clicked into widget to reveal editing pane to right; inside here, an add metric button
  2. Click Add Group and select either your NPS field group or the Measure Group you made earlier.
  3. Click Count.
  4. Change the metric to Average or Top / Bottom Box.
  5. If desired, adjust your Radius Max. This is the highest possible value the chart will show.

    Qtip: NPS is scored from 0 to 10, so 10 can be a great value for this maximum. However, you may also make adjustments based on what makes the widget easier to read. It looks like the average NPS isn’t a perfect 10 in our example study, so we lowered the maximum to make the differences between brands more readable.
  6. The Circle Margin is where you want each scale marked out.
    Qtip: For smaller scales, you may want to see a ring for every value, hence we set ours to 1. For larger scales, this number should be higher to make the graph easier to read. For example, if the maximum value was 100, your circle margin might be 5 or 10.

Charts with Multiple Spokes Groups

If you would like to display multiple groups on your radar chart, you’ll need to format your data a little differently.

We still advise that you set up each the data you want to display in the radar chart as Measure Groups of Number Sets. But each group of fields needs to have the same brands or attributes with the same naming. In the following screenshot, you see that both the NPS and Share of Wallet groups have the same brands inside: WeVS, Gartells, Jones, Walblue, and MiniRX.

Measure groups mapped in dashboard data

Once you’re ready, you can add another measure to your radar chart by clicking Add Group.

Orange spider chart with dot of blue in the middle

Qtip: The radar chart will still generate data if one measure group has an extra field that the other doesn’t, but because there’s no data to populate, the chart will look uneven. Look at the screenshot below to see how a radar chart with NPS (which didn’t collect data for “Other brands”) and Share of Wallet (which did collect data on “Other brands) will display data.

Two rings of color in a radar chart. An entire wedge of that color is missing when one of the spokes doesn't have data

Breaking Out Radar Charts with Data Series

You may want to break out your radar chart by additional information, such as Embedded Data, survey metadata, or demographic data you’ve collected on recipients. For example, you may want to see how NPS ratings for each brand differed by the respondents’ industry, by the wave of the survey distribution, or by the date the survey was sent.

You can do this by clicking Set Data Series and selecting a Text Set or Multi-Answer Text Set field.

Double clicked into widget reveals editing pane to right, which has a set data series button

Here is what that radar chart looks like broken out by wave:

Three blobs of color on a radar chart with a legend expalining what each color corresponds to

To switch the spokes (fields listed around the edges) and the groups (colorful maps), you can click the icon beneath Swap Spokes and Groups.

Four colors in the spider chart; shapes and labels change as you hit the swap axis button

Qtip: Survey wave is not a default field. If you want to identify waves of distribution, you need to make sure you’ve added Embedded Data to your survey flow and included a query string on the end of your survey link each time you distribute the survey.
Qtip: We do not recommend adding a data series if your chart already has multiple groups loaded into it.

Widget Customization Options

Double clicked into widget reveals editing pane to right, with additional options highlighted

  1. See Widget Filters for how to add a widget directly to your radar chart.
  2. Deselect a field to hide it from the widget. You can do this with both spokes and groups.
  3. Names of spoke can be adjusted right in the widget, but names of measure fields or data series have to be adjusted in the dashboard data.
  4. Click the color next to a measure to adjust it.

The order of fields cannot be adjusted.