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Axes

In charts, the rectangular coordinate system is used to determine each point uniquely on a plane through two numbers, the argument and the value of a point. To define these coordinates, two perpendicular directed lines - the axes - are specified: the axis of arguments and the axis of values.

Axis options can be set using the chart's BootstrapChart.ValueAxisCollection and BootstrapChart.ArgumentAxis properties. Use the BootstrapCoordinateSystemChart.SettingsCommonAxis property if you need to set the same values for all axes.

There are three types of argument and value axes:

  • Discrete - Contains a finite number of values, each of which represents an argument or value of a particular series point, and is created if arguments or values in the series' data source are strings. These values are called categories and arranged in a certain order.

  • Continuous - Contains an infinite number of values, some of which represent series point arguments or values, and is created if arguments or values in the series' data source are numeric or date-time values.

  • Logarithmic - Contains an infinite number of values, each of which represents a number (logarithm base) raised to a power on the logarithmic axis and can be used with numeric data source values only. The BootstrapChartAxisSettingsBase.LogarithmBase option specifies these numbers. This axis is useful when you visualize a huge range of data.

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