Inizializzazione

jpgraph-3.5.0b1/src/Examples/inyaxisex1.php

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+<?php // content="text/plain; charset=utf-8"
+require_once ('jpgraph/jpgraph.php');
+require_once ('jpgraph/jpgraph_line.php');
+
+// Callback to negate the argument
+function _cb_negate($aVal) {
+    return round(-$aVal);
+}
+
+// A fake depth curve
+$ydata = array(0,1,4,5,8,9,10,14,16,16,16,18,20,20,20,22,22.5,22,19,19,15,15,15,15,10,10,10,6,5,5,5,4,4,2,1,0);
+
+// Negate all data
+$n = count($ydata);
+for($i=0; $i<$n; ++$i) {
+    $ydata[$i] = round(-$ydata[$i]);
+}
+
+// Basic graph setup
+$graph = new Graph(400,300);
+$graph->SetScale("linlin");
+$graph->img->SetMargin(50,50,60,40);	
+$graph->SetMarginColor('darkblue');
+$graph->SetColor('darkblue');
+$graph->SetAxisStyle(AXSTYLE_BOXOUT);
+
+$graph->title->Set("Depth curve. Dive #2");
+$graph->title->SetFont(FF_FONT1,FS_BOLD);
+$graph->title->SetColor("white");
+
+$graph->subtitle->Set("(Negated Y-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");
+
+
+$lp1 = new LinePlot($ydata);
+$lp1->SetColor("yellow");
+$lp1->SetWeight(2);
+
+
+$graph->Add($lp1);
+$graph->Stroke();
+?>
+
+