loglogex1.php
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<?php // content="text/plain; charset=utf-8"
require_once ("jpgraph/jpgraph.php");
require_once ("jpgraph/jpgraph_log.php");
require_once ("jpgraph/jpgraph_line.php");
require_once ("jpgraph/jpgraph_scatter.php");
 
 
$ab2  = array( 1.5,  2.0,  2.5,  3.0,  4.0,  5.0,  6.0,  8.0, 10.0,
              12.0, 15.0, 20.0, 25.0, 30.0, 40.0, 50.0, 60.0 ,75.0,
              100., 125., 150.);
$mn2  = array( 0.5,  0.5,  0.5,  0.5,  0.8,  0.8,  0.8,  0.8,  1.0,
               1.0,  1.0,  1.0,  1.0,  2.0,  2.0,  2.0,  2.0,  2.0,
               5.0,  5.0,  5.0);
$rhos = array(30.0, 31.0, 32.0, 34.0, 35.5, 37.5, 38.0, 39.5, 41.5,
              43.0, 41.0, 42.0, 42.5, 45.0, 49.0, 53.5, 58.0, 66.5,
              75.0, 81.0, 89.0);
 
// Create the graph.
$graph = new Graph(500,300);     
$graph->SetScale("loglog");              
$graph->SetY2Scale("lin");               
$graph->y2axis->SetColor("blue","blue"); 
 
$graph->img->SetMargin(50,70,40,50);     
$graph->title->Set("Geoelektrik");       
$graph->xaxis->title->Set("Auslage ab/2 [m]");  
$graph->yaxis->title->Set("rho_s [Ohm m]");     
$graph->y2axis->title->Set("mn/2 [m]");         
$graph->y2axis->title->SetColor("blue");
$graph->y2axis->SetTitleMargin(35);
$graph->title->SetFont(FF_FONT1,FS_BOLD);       
$graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);
$graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD); 
$graph->xgrid->Show(true,true);                  
$graph->ygrid->Show(true,true);                  
 
// Create the linear plot
 
$lineplot=new LinePlot($rhos,$ab2);       
$lineplot->SetWeight(1);
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetWidth(2);
 
// Create scatter plot 
 
$scplot=new ScatterPlot($mn2,$ab2);
$scplot->mark->SetType(MARK_FILLEDCIRCLE);
$scplot->mark->SetColor("blue");
$scplot->mark->SetWidth(2);
 
// Add plots to the graph
 
$graph->AddY2($scplot);
$graph->Add($lineplot);
 
// Display the graph
$graph->Stroke();
 
?>