SVGGraph options: start_angle

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Option name:

start_angle

Default value:

0

RadarGraph: 90

Added in version:

2.5

Data type:

number [?]

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).

array: An array, the number and data types of its members will depend on the option for which is it used.
boolean: A boolean TRUE or FALSE value, or any values that convert easily such as 1, "1", 0 and "".
callback: A callable function, which can be either the name of a function or an anonymous function itself.
colour: 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.
fill: A colour value or one of the gradients and patterns supported by SVGGraph. See the SVGGraph colours page for details.
integer: A negative or positive whole number or 0.
measurement: An integer or float value, or a string containing a number followed by one of these CSS units: px, in, cm, mm, pt, pc.
number: Any number supported by PHP, for example 1 or -3.2 or 1.63e5 or M_PI.
string: Single or double quoted strings. Remember to double-quote your strings if you are inserting a line break:
"Line 1\nLine 2".

Per-dataset:

Supported by:

DonutGraph ExplodedPie3DGraph ExplodedPieGraph MultiRadarGraph Pie3DGraph PieGraph PolarArea3DGraph PolarAreaGraph RadarGraph

Tags:

pie radar

Initial direction of graph.

This option specifies the starting angle in degrees for graphs that draw their data items in a circle. For both pie graphs and radar graphs, a start_angle of 0 is to the right at 3 o'clock. This is the default for pie graphs.

For radar graphs, the default angle of 90° is straight up at 12 o'clock, 180° is at 9 o'clock and 270° is straight down at 6 o'clock.

For pie graphs, 90° is straight down at 6 o'clock, 180° is to the left at 9 o'clock and 270° is at the top at 12 o'clock... except when you enable the reverse option, then the angles are reversed. With reverse enabled, 90° points straight up and 270° points straight down. This reversal only applies to the pie graph and its family of graphs, not the radar graphs. Yes, really.

Example:

$settings['start_angle'] = 45;

This example will start off in the top right if it is used with a radar graph. It will be either in the bottom right or the top right for pie graphs depending on the value of the reverse option.

See also:: sort reverse end_angle

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