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diff --git a/docs/tutorial.txt b/docs/tutorial.txt index 543a411..8896d16 100644 --- a/docs/tutorial.txt +++ b/docs/tutorial.txt @@ -215,6 +215,55 @@ line and bar charts. .. image:: img/tutorial_bar_options.svg.png :alt: Configured highlight in combined line and bar chart +Radar charts +------------ + +Radar charts are very similar to line charts, but only with one axis, which +will be drawn multiple times, rotated around the center point of the chart. + +.. include:: tutorial/tutorial_radar_chart.php + :literal: + +This again is one of the simplest ways to create a radar chart. Nearly all +options described later are also available in radar charts. The basic +difference is, that a ezcGraphRadarChart object is created in line 6. The +radar charts accept multiple data sets, like bar and line charts. In line 14 +the first element of the data set is reassigned as the last element to close +the circle. You may also not reassign this value to get a radar chart where +the tails do join. + +.. image:: img/tutorial_radar_chart.svg.png + :alt: Simple radar chart + +Controlling radar axis +~~~~~~~~~~~~~~~~~~~~~~ + +Instead of having a x and a y axis the radar chart has a main axis, which is +the aequivalent to the y axis in the other charts, and a rotation axis, the +aequivalent of the x axis. The steps on the rotation axis define the positions +of the rotated main axis. This way you may use all available data sets and +axis. + +.. include:: tutorial/tutorial_complex_radar_chart.php + :literal: + +The settings on the graph will be explained later in the tutorial in detail. +In line 11 the type of the rotation axis is set to a numeric axis, which is +explained in "Chart elements" -> "Axis". + +For line 15 to 23 a first data set is added with some random data. On the base +of this data a new data set is build which calculates a polynomial +interpolation function on the data. This is described in more detail in the +section "Datasets" -> "Average polynomial dataset". Finally the default colors +and symbols from the palette are modified. + +.. image:: img/tutorial_complex_radar_chart.svg.png + :alt: Complex radar chart + +The resulting radar chart shows how minor steps on the rotation axis are drawn +as grayed out axis and major steps as regular axis. It also obvious that all +types of data sets can be drawn using radar charts. + Palettes ======== |
