Introduction
The spider chart is used to compare values between data points on multiple attributes. Each attribute is a spoke, with value indicated by distance from the center. One polygon is traced for each data point. However, people often perceive value based on polygon area, which depends on the order of attributes. It is usually better to use a parallel coordinates plot or multiple grouped bar charts to avoid this distortion.
Configuring the Spider Chart Few Periods
To plot a Spider chart, perform the following steps –
- Open the Analytics page and click the Add Widget icon. The Analytics Builder appears.
- Click the Spider Chart Few Periods chart. The Settings page appears.
- Enter the given information.
Widget Name – Modify the widget name if required.
Data Criteria
Select workitem type – Select the workitem type for which you want to plot the chart. You can select any number of workitems for a scatter chart. If the selected workitem type has no instances in it, a message is displayed on the screen.
Select workitem value – Select the workitem instances for which you want to plot your chart.
Date Range – Select the start date and the end date under the data criteria to plot the chart. By default, it loads the project start and end dates.
Dimensions and Settings
No of Dimension – Select the number of dimensions you want to see in your chart. You can select at least 3 dimensions and can increase the number of dimensions to maximum upto 8.
Select Attributes – Select the attribute for each dimension you have selected. You can select one attribute (and its values) for each dimension. If you select a percent field, then you need to specify the minimum, maximum and interval of the values.
Interpreting the chart
The Spider chart is a chart that consists of a sequence of equiangular spokes. Each spoke or dimension on the chart represents one attribute of the workitem. The Spider chart enables you to see the workitems with respect to the values of the attributes.For example, if one dimension is representing the Size attribute, then the different data points on the dimensions represent the different sizes like S, M, L etc. Next to the chart, a table is shown with the workitem ID and their names. Hovering over a workitem (ID and name) highlights the values of that particular workitem in the chart.
Best use
The scatter plot chart helps you understand the relationship between the two or more values of a numeric field of the selected workitem type.