SVGGraph options: structure

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Option name:
Default value:
Added in version:
Data type:
array [?]

The datatypes used in this documentation for specifying SVGGraph options are described below. All options can be a literal value of the data type described, a variable containing the data type, or an expression that will produce the data type when evaluated (and they must always be valid PHP expressions).

An array, the number and data types of its members will depend on the option for which is it used.
A boolean TRUE or FALSE value, or any values that convert easily such as 1, "1", 0 and "".
A callable function, which can be either the name of a function or an anonymous function itself.
Any of the colour values supported by SVG inside a single or double quoted string. These include three and six digit hex codes, RGB and RGBA colours, and colour names. SVG uses "none" for no colour, which generally leaves things transparent.
A colour value or one of the gradients and patterns supported by SVGGraph. See the SVGGraph colours page for details.
A negative or positive whole number or 0.
An integer or float value, or a string containing a number followed by one of these CSS units: px, in, cm, mm, pt, pc.
Any number supported by PHP, for example 1 or -3.2 or 1.63e5 or M_PI.
Single or double quoted strings. Remember to double-quote your strings if you are inserting a line break:
"Line 1\nLine 2".
Supported by:
ArrayGraph Bar3DGraph BarAndLineGraph BarGraph BoxAndWhiskerGraph BubbleGraph CandlestickGraph CylinderGraph Donut3DGraph DonutGraph EmptyGraph ExplodedDonut3DGraph ExplodedDonutGraph ExplodedPie3DGraph ExplodedPieGraph ExplodedSemiDonut3DGraph ExplodedSemiDonutGraph FloatingBarGraph GanttChart GroupedBar3DGraph GroupedBarGraph GroupedCylinderGraph Histogram HorizontalBar3DGraph HorizontalBarGraph HorizontalFloatingBarGraph HorizontalGroupedBar3DGraph HorizontalGroupedBarGraph HorizontalStackedBar3DGraph HorizontalStackedBarGraph LineGraph MultiLineGraph MultiRadarGraph MultiScatterGraph MultiSteppedLineGraph Pie3DGraph PieGraph PolarArea3DGraph PolarAreaGraph PopulationPyramid RadarGraph ScatterGraph SemiDonut3DGraph SemiDonutGraph StackedBar3DGraph StackedBarAndLineGraph StackedBarGraph StackedCylinderGraph StackedGroupedBar3DGraph StackedGroupedBarGraph StackedGroupedCylinderGraph StackedLineGraph SteppedLineGraph
global structure

Sets the structure for use with structured data.

This option sets the structure of the data for use by SVGGraph when using structured data. If the structured_data option is not set, setting the structure option will automatically enable structured data.

The structure option should be an array containing a mapping between the fields of the data item arrays and the data fields used by SVGGraph. The only required fields are "key" and "value".

Here is a simple example of a data table:

1 2 3 3 4
2 3 4 5 6

I've named the fields "A" to "E" to keep the examples short, hopefully your data will have more meaningful field names.

When converted to a PHP structured data array the data table will look like this:

$values = array(
  array('A' => 1, 'B' => 2, 'C' => 3, 'D' => 3, 'E' => 4),
  array('A' => 2, 'B' => 3, 'C' => 4, 'D' => 5, 'E' => 6),

The simplest structure option you could set to use this data is:

$settings['structure'] = array('key' => 'A', 'value' => 'B');

Field "A" is used as the key and "B" is used as a value. There will only be one dataset available to the graphs for plotting, and the fields "C", "D" and "E" will be ignored.

This is actually simpler than the default structure SVGGraph would use if only the structured_data option is set - that would use fields "B" to "E" as data values.

Here is a more complex example:

$settings['structure'] = array(
  'key'         => 'C',
  'value'       => array('A', 'B'),
  'marker_size' => array('D', NULL),
  'axis_text'   => 'E',

This example uses field "C" as the key instead of "A", which is used as a value field along with "B". The graph will have two datasets available for plotting.

The next entry sets the marker_size option used by line and scatter graphs. The size of the marker for dataset 0 (mapped to field "A") will come from field "D", while the NULL means that the markers for dataset 1 (from field "B") will use the global setting.

Finally, the axis_text option set to "E" means that the text underneath the axis at key positions 3 and 4 (from the key field "C") will be the values 4 and 6.

For full details of the supported fields and more examples, please visit the structured data page.

See also:

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