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Working with Polar Chart Data

This topic discusses useful information that will help you to ensure that your data is rendered properly in the polar chart.

Data Requirements

While the Chart control allows you to easily point the chart to your own custom data, it is important that you are supplying the appropriate amount and type of data that the chart requires. If the data does not meet the minimum requirements based on the type of chart that you are using, an error will be generated.

The following is a list of data requirements for polar charts:

Mapping Data to Polar Charts

The chart data is rendered using the following rules:

  • The first column will be displayed as the angle, and the second column will be displayed as the radial distance.

See below for an example data set, along with the rendered polar chart. This data represents cell phone towers' signal strength in various directions by more than one carrier. This data is hypothetical and is simply an example of how the Polar chart is used. The first column represents a cellular service provider company name, followed by angular orientation and signal strength in 'db'.

The data is being grouped by the chart when plotted. AT&T entries are grouped together as are the Verizon entries.

Company Angle Strength

AT&T

0

-20

AT&T

30

-60

AT&T

90

-29

AT&T

120

-45

AT&T

160

-10

AT&T

180

-10

AT&T

220

-10

Verizon

0

-90

Verizon

30

-40

Verizon

90

-19

Verizon

40

-105

Verizon

330

-60

Verizon

330

30

Shows a Polar Chart based on the data listed in the table above.