Subversion-Projekte lars-tiefland.php_share

<?php

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

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

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

$numpoints=50;

$k=0.05;

// Create some data points

for($i=-$numpoints+1; $i<0; ++$i) {

	$datay[$i+$numpoints-1]=exp($k*$i)*cos(2*M_PI/10*$i)*14;

	$datayenv[$i+$numpoints-1]=exp($k*$i)*14;

	$datax[$i+$numpoints-1]=$i;

}

for($i=0; $i<$numpoints; ++$i) {

	$datay[$i+$numpoints-1]=exp(-$k*$i)*cos(2*M_PI/10*$i)*14;

	$datayenv[$i+$numpoints-1]=exp(-$k*$i)*14;

	$datax[$i+$numpoints-1]=$i;

}

// Setup the basic parameters for the graph

$graph = new Graph(500,250,"auto");

$graph->SetScale("intlin");

$graph->SetShadow();

$graph->SetBox();

$graph->title->Set("Impuls Example 4");

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

// Set some other color then the boring default

$graph->SetColor("lightyellow");

$graph->SetMarginColor("khaki");

// Set legend box specification

$graph->legend->SetFillColor("white");

$graph->legend->SetLineWeight(2);

// Set X-axis at the minimum value of Y-axis (default will be at 0)

$graph->xaxis->SetPos("min");	// "min" will position the x-axis at the minimum value of the Y-axis

// Extend the margin for the labels on the Y-axis and reverse the direction

// of the ticks on the Y-axis

$graph->yaxis->SetLabelMargin(12);

$graph->xaxis->SetLabelMargin(6);

$graph->yaxis->SetTickSide(SIDE_LEFT);

$graph->xaxis->SetTickSide(SIDE_DOWN);

// Add mark graph with static lines

$line = new PlotLine(HORIZONTAL,0,"black",2);

$graph->AddLine($line);

// Create a new impuls type scatter plot

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

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

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

$sp1->mark->SetWidth(3);

$sp1->SetImpuls();

$sp1->SetColor("blue");

$sp1->SetWeight(1);

$sp1->SetLegend("Non-causal signal");

$graph->Add($sp1);

// Create the envelope plot

$ep1 = new LinePlot($datayenv,$datax);

$ep1->SetStyle("dotted");

$ep1->SetLegend("Positive envelope");

$graph->Add($ep1);

$graph->Stroke();

?>