Subversion-Projekte lars-tiefland.php_share

<?php

include ("../jpgraph.php");

include ("../jpgraph_scatter.php");

include ("../jpgraph_line.php");

// Create some "fake" regression data

$datay = array();

$datay2 = array();

$datax = array();

$a=rand(-3,3);

$b=rand(-5,5);

for($x=0; $x<20; ++$x) {

    $datay[] = $a*$x + $b;

    $datay2[] = $a*$x + $b + rand(-30,30);

    $datax[] = $x;

}

// Create the graph

$graph = new Graph(300,200,'auto');

$graph->SetScale("linlin");

// Setup title

$graph->title->Set("Example of linear regression");

$graph->title->SetFont(FF_FONT1,FS_BOLD);

// make sure that the X-axis is always at the

// bottom at the plot and not just at Y=0 which is

// the default position

$graph->xaxis->SetPos('min');

// Create the scatter plot with some nice colors

$sp1 = new ScatterPlot($datay2,$datax);

$sp1->mark->SetType(MARK_FILLEDCIRCLE);

$sp1->mark->SetFillColor("red");

$sp1->SetColor("blue");

$sp1->SetWeight(3);

$sp1->mark->SetWidth(4);

// Create the regression line

$lplot = new LinePlot($datay);

$lplot->SetWeight(2);

$lplot->SetColor('navy');

// Add the pltos to the line

$graph->Add($sp1);

$graph->Add($lplot);

// ... and stroke

$graph->Stroke();

?>