70 lines
1.6 KiB
PHP
70 lines
1.6 KiB
PHP
<?php
|
|
include ("../jpgraph.php");
|
|
include ("../jpgraph_line.php");
|
|
|
|
// Callback to negate the argument
|
|
function _cb_negate($aVal) {
|
|
return round(-$aVal);
|
|
}
|
|
|
|
// A fake depth curve
|
|
$ydata = array(0,1,4,5,8,9,10,14,16,16,16,18,20,20,20,22,22.5,22,19,19,15,15,15,15,10,10,10,6,5,5,5,4,4,2,1,0);
|
|
|
|
$n = count($ydata);
|
|
$y2data = array();
|
|
for( $i=0; $i< $n; ++$i ) {
|
|
$y2data[] = $ydata[$i]+10;
|
|
}
|
|
|
|
// Negate all data
|
|
$n = count($ydata);
|
|
for($i=0; $i<$n; ++$i) {
|
|
$ydata[$i] = round(-$ydata[$i]);
|
|
$y2data[$i] = round(-$y2data[$i]);
|
|
}
|
|
|
|
// Basic graph setup
|
|
$graph = new Graph(400,300,"auto");
|
|
$graph->SetScale("linlin");
|
|
$graph->SetY2Scale("lin");
|
|
$graph->SetMargin(50,50,60,40);
|
|
$graph->SetMarginColor('darkblue');
|
|
$graph->SetColor('darkblue');
|
|
|
|
// Setup titles
|
|
$graph->title->Set("Inverting both Y-axis");
|
|
$graph->title->SetFont(FF_FONT1,FS_BOLD);
|
|
$graph->title->SetColor("white");
|
|
|
|
$graph->subtitle->Set("(Negated Y & Y2 axis)");
|
|
$graph->subtitle->SetFont(FF_FONT1,FS_NORMAL);
|
|
$graph->subtitle->SetColor("white");
|
|
|
|
// Setup axis
|
|
$graph->yaxis->SetLabelFormatCallback("_cb_negate");
|
|
$graph->xaxis->SetColor("lightblue","white");
|
|
$graph->yaxis->SetColor("lightblue","white");
|
|
$graph->ygrid->SetColor("blue");
|
|
|
|
// Setup Y2 axis
|
|
$graph->y2axis->SetLabelFormatCallback("_cb_negate");
|
|
$graph->y2axis->SetColor("darkred","white");
|
|
$graph->y2scale->SetAutoMax(0); // To make sure it starts with 0
|
|
|
|
// Setup plot 1
|
|
$lp1 = new LinePlot($ydata);
|
|
$lp1->SetColor("yellow");
|
|
$lp1->SetWeight(2);
|
|
$graph->Add($lp1);
|
|
|
|
// Setup plot 2
|
|
$lp2 = new LinePlot($y2data);
|
|
$lp2->SetColor("darkred");
|
|
$lp2->SetWeight(2);
|
|
$graph->AddY2($lp2);
|
|
|
|
$graph->Stroke();
|
|
?>
|
|
|
|
|