Radar Chart

Version

Application Scenario

The radar charts, also known as the spider web chart, map data on multiple dimensions on coordinate axes that start from the same center of circle and end at the edge of the circle, and the points of the same group are connected with lines.

The radar chart can intuitively display multidimensional datasets and allows you to examine which variables have similar values and whether there are outliers between variables. The radar chart can also be used to view which variables have higher or lower scores within a dataset. Therefore, the chart is suitable for displaying performance.

Chart Feature

Advantage: The radar chart is suitable for displaying multiple key features of a dataset, comparing the features with standard values, and comparing the values of data on multiple dimensions.

Disadvantage: The radar chart contains a limited number of polygons, generally four to eight, and the number of records for comparison should not be too large. Although there are grid lines for reference, it is still difficult to intuitively compare the specific value of the variables within the chart, for the radial distance is difficult to judge.

Note:

The polar angle and polar axis of the radar chart are explained in the following figure.

Type

After inserting a radar chart, you can freely select the subtype in Type on the right attribute panel, as shown in the following figure.

Data

For details about binding data in the radar chart, see Chart Data.

Style

For details about the style design of the radar chart, see Chart Style.

1. The series settings of Radar Chart under Style > Series are different from the basic style and are introduced separately:

• Color Scheme: You can switch the color scheme of the radar chart area. Currently, eight color schemes are available.

• Shape: You can switch the edge outline of the radar chart. Currently, you can select Circle or Polygonal.

• Line Style: You can select the thickness of the boundary line of the radar chart.

• Null Value Break: When it is enabled, if there is no data for a category, a break will appear in the entire graph outline. When it is disabled, the two nearest data points on either side of the null value will be concatenated into a complete line.

• Point Style: You can select General or Custom. Custom allows you to upload images, while General allows you to set Type, Fill Color, Radius, and others.

• Type: Currently, 9 types are available for the style of data points of the radar chart.

• Fill Color: You can select Series Color or Color for the fill color of the data points on the radar chart.

• Radius: You can control the size of the data points on the radar chart, with a step size of 0.5.

• Fill Color: You can select Series Color or Color for the fill color of the data area on the radar chart.

• Opacity: The transparency of the radar chart data area can be set from 0 to 100%.

2. The setting in Style > Axis > Polar Angle of the radar chart is different from the basic style and will be introduced separately:

• Axis Label: You can control the display or hiding of values for the polar axis categories.

• Character: You can set the label font, size, color, tilt, and boldness.

• Text Rotation: You can control the rotation direction of axis labels from -90 to 90.

• Label Gap: The interval between polar axis labels can be set to Auto or Fixed(a fixed value).

• Type: You can set the thickness of the polar axis lines.

• Color: You can set the color of the polar axis lines, defaulting to gray.

• Axis Label Format: You can set the format of the polar axis labels to Common or Custom.

3. The setting in Style > Axis > Polar Axis of the radar chart is different from the basic style and will be introduced separately:

• Axis Label: You can control the display or hiding of values for the radial axis categories.

• Value Definition: You can select Unified Calculation or Separate Specification. Unified Calculation allows you to set Custom Minimum Value, Custom Maximum Value, Custom Main Unit, and Custom Log Base. Separate Specification allows you to select Dataset and set Max Value and Min Value for Category.

• Custom Minimum Value: You can control the minimum length of Polar Axis.

• Custom Maximum Value: You can control the maximum length of Polar Axis.

• Custom Main Unit: You can control the scale values of Polar Axis which can be configured with formulas.

• Custom Log Base: You can control the variation of scale values onPolar Axis. For example, if 10 is selected, the axis scale will be like 1, 10, 100, 1000.

• Type: You can set the thickness of the lines of Polar Axis.

• Color: You can set the line color of Polar Axis, defaulting to gray.

• Axis Label Format: You can set the format of Polar Axis labels to Common or Custom. 

Special Effect

For details about the Special Effect settings of the radar chart, see Special Effect.

Data Preparation

Create a general report and create a data query named ds1. The SQL statement is as follows:

SELECT Product.Category_name, Inventory_quantity, Order_quantity, Re_order_quantity FROM Product, Category

WHERE Product.CategoryID = Category.CategoryID AND Product.Category_name != 'Daily necessities'

ORDER BY Product.Category_Name.

Chart Insertion

Merge required cells, select the merged cell, click the Insert Chart icon on the upper toolbar, select Radar Chart, and click OK, as shown in the following figure.

Chart Design

Select the chart, click the Cell Element icon on the right property panel, and set the attributes (Type, Data, Style, and Special Effect) for the chart.

Data Binding

Click Data and bind required data to the chart, as shown in the following figure.

Style Setting

1. You need to modify the title of the radar chart. To set the polar axis label not to be displayed, you can choose Style > Axis > Polar Axis, set Axis Label to Hide, and retain the default settings of other items.

2. Deselect all the items under Special Effect > Toolbar > Content, as shown in the following figure.

Effect Display

PC

Save the template and click Pagination Preview. The following figure shows the effect.

Mobile Terminal

The report can be previewed on both the DataAnalyst app and the HTML5 terminal. The following figure shows the effect.

For details, you can download the template Radar Chart.cpt.