CLASS ScatterPlot EXTENDS Plot 

(Defined in: jpgraph_scatter.php : 130)

ScatterPlot	Plot
ScatterPlot() SetImpuls() SetLinkPoints()

Class usage and Overview

A scatter plto is used to display a number of points specified by (x,y) coordinates. To specify the apperance of points the 'mark' property has to be set. See PlotMark class for further details.

The marks can also be connected with lines by calling the method SetLinkPoints()

See also related classes:

LinePlot and PlotMark

Class Methods

function ScatterPlot($datay,$datax)

Constructor

Argument Default Description

$datay Y-data array

$datax false X-data array

Argument	Default	Description
$datay		Y-data array
$datax	false	X-data array

Description

Create a new scatter plot

Example

$datax = array( ... );
$datay = array( ... );
$scatter = new ScatterPlot($datay,$datax);

function SetImpuls($f)

Specify impuls type of sctter plot

Argument Default Description

$f true True=Use impuls type

Argument	Default	Description
$f	true	True=Use impuls type

Description

By specifying the impuls type each plot is linked to the X-axis by a line. This type of plots is often used to illustrate signals in discrete time signal processing.

Example

$scatterplot->SetImpuls();

function SetLinkPoints($aFlag,$aColor,$aWeight)

Combine the scatter plot points with a line

Argument Default Description

$aFlag true True=Link scatter points

$aColor "black" Color of line

$aWeight 1 Line width

Argument	Default	Description
$aFlag	true	True=Link scatter points
$aColor	"black"	Color of line
$aWeight	1	Line width

Description

Link scatter plots with a line of specified color and width.

Example

$scatterplot->SetLinkPoints();